booster shot singapore

Booster Shots in Singapore


Understanding COVID-19 Booster Shots in Singapore: A Guide to Eligibility, Access, and Benefits


Booster shots refer to an additional dose of a COVID-19 vaccine taken after completing the primary vaccination series. They help restore waning immunity and enhance protection against infection over time. As a key part of Singapore's vaccine strategy, COVID-19 booster shots are made conveniently accessible.


This article provides an in-depth look at the COVID-19 booster programme in Singapore, including who is eligible, where to get it, how it uplifts immunity and its role in enabling a resilient reopening.


Introduction to Booster Shots


It acts as a reinforcement dose to "boost" immunity when protection levels decline naturally months after primary vaccination. Key points:


- Additional dose taken some months after primary vaccine series


- Helps restore waning immunity and antibody levels


- Enhances protection from symptomatic infection


- Prompts the immune system to recognize and fight the virus


- Enable antibodies to remain above protective levels for longer


- Recommended globally as part of a complete vaccination regimen


By topping up antibodies, it provide reinforced defenses against COVID-19 and uplifts population-level immunity.


Importance of Booster Shots


Sustaining Immunity: Over time, the effectiveness of certain vaccines may decrease or wane. They are administered to reinforce immune responses and raise antibody levels for sustained protection against specific diseases.


Emerging Variants: As new variants of infectious diseases emerge, it becomes even more critical. These shots can help protect individuals from modified strains or mutations that might not be adequately covered by the initial vaccination.


Population Health: By maintaining high vaccination coverage through booster doses, population-level immunity is enhanced. This reduces the transmission rates of contagious diseases within communities and subsequently minimises public health risks.


Common Diseases Requiring Boosters


Diphtheria and Pertussis: The diphtheria-tetanus-pertussis (DTP) vaccine is given in multiple doses during childhood and requires booster shots every 10 years to maintain immunity against these infections.


Tetanus: Tetanus toxoid boosters are recommended every 10 years for adults to ensure protection against tetanus bacteria found in soil, dust, and manure that can enter through wounds.


Pneumococcal Disease: Certain individuals with higher risk factors, such as older age or weakened immune systems, may need periodic pneumococcal vaccine boosters to prevent pneumonia infection caused by Streptococcus pneumoniae bacteria.


Influenza: Annual flu shot boosters are advised due to the changing strains prevalent each year; this ensures optimal protection from seasonal influenza viruses.


Measles, Mumps, and Rubella (MMR): Booster doses of the MMR vaccine are recommended to maintain lifelong immunity against these highly contagious viral diseases.


Types of Booster Shots in Singapore

National Immunisation Programme: The Ministry of Health (MOH) oversees the national immunisation programme that includes routine childhood vaccinations such as DTP, MMR, pneumococcal vaccines, and mandatory boosters for adults like tetanus and diphtheria.


COVID-19 Booster Programme: In response to the ongoing COVID-19 pandemic, Singapore has implemented a booster programme targeting specific population groups. This includes administering additional doses of authorised COVID-19 vaccines to individuals who have completed their primary vaccination course.


Travel-related boosters: Individuals planning travel may require specific booster shots based on their destination country's immunisation requirements or prevailing health risks in those regions. Common examples include hepatitis A and B vaccines for certain destinations.

Accessing Booster Shots in Singapore


In Singapore, they are readily accessible through various healthcare providers such as clinics, polyclinics, hospitals, and designated vaccination centers. The MOH ensures ample availability of vaccines nationwide by coordinating distribution through both public and private healthcare sectors.


To determine eligibility for specific booster shots or understand recommended schedules for different populations, individuals can consult with healthcare professionals or refer to guidelines provided by MOH via official websites or helplines.


It holds great significance in maintaining robust immunity against infectious diseases over time. By actively participating in national immunization programs and staying updated on recommended boosters, individuals can contribute to personal well-being while safeguarding public health within the dynamic landscape of disease prevention in Singapore.


Singapore's Booster Programme


Singapore began administering COVID-19 booster shots from September 2021 onwards. Key details:


- Uses mRNA vaccines Pfizer or Moderna regardless of earlier vaccine taken


- Programme prioritized seniors and medically vulnerable initially before expanding into phases


- Doses administered about 5-9 months after primary series


- Free for all eligible individuals under the National Vaccination Programme


- Walk-in access at designated vaccination centres


- Around 500,000 doses administered monthly at the programme's peak


The extensive booster programme enabled a large majority of the population to upgrade their immunity conveniently.

Eligibility and Recommendations


Singapore has taken a phased approach to its eligibility based on age and risk profiles:


Seniors 60 years and above are Highly recommended as immunity wanes faster with age.


Age 18-59 years old: Recommended, especially for those with comorbidities.


Youth 12-17 years old: Recommended for moderate/severely immunocompromised individuals under medical discretion.


Minimum of 5 months interval from the last dose before the booster. This provides the best uplift.


Check eligibility online via the Vaccine.GOV website. Those eligible will receive an SMS invite when it's time.


With broad eligibility, almost all individuals can receive it for added protection.

Accessibility of Boosters


They are made highly convenient and accessible in Singapore:


Vaccination Centres

All active vaccination centres under the National Vaccination Programme offer walk-in booster shots with no appointment needed.


They are located conveniently across the island like community centres and clubs for easy access.


Polyclinics and GPs

Selected Public Health Preparedness Clinics (PHPCs) provide booster vaccination by appointment. Check online for locations.


Mobile Vaccination Teams

Outreach teams visit vulnerable or homebound elderly to administer their booster dose.


Overseas Programmes

Special vaccination operations conducted overseas enable overseas Singaporeans and travelers to receive their boosters conveniently before returning.


Notice the convenience of the many access options. Singaporeans are encouraged to take up theirs readily once eligible.

Covid vaccines approved for use as booster shots in Singapore


In Singapore, the Ministry of Health has approved the following COVID-19 vaccines for use:


1. Pfizer-BioNTech (Comirnaty) Vaccine

The Pfizer-BioNTech (Comirnaty) vaccine is one of the approved vaccines for use as a booster shot in Singapore. It is a messenger RNA (mRNA) vaccine that is safe and effective in preventing COVID-19. The booster shot with the Pfizer-BioNTech vaccine can help enhance immunity and provide additional protection against the virus.


2. Moderna Vaccine

The Moderna vaccine is also approved for use as a booster shot in Singapore. Like the Pfizer-BioNTech vaccine, it is an mRNA vaccine that has demonstrated high efficacy in preventing COVID-19 infection. The booster shot with the Moderna vaccine can help strengthen the immune response and provide further defense against the virus.


3. Sinovac Vaccine (CoronaVac)

In addition to the mRNA vaccines, the Sinovac vaccine (CoronaVac) has also been approved for use as a booster shot in Singapore. The Sinovac vaccine is an inactivated vaccine that uses killed virus particles to generate an immune response. The booster shot with the Sinovac vaccine can help bolster the immune system and provide additional protection against COVID-19.


It is important to note that the eligibility and recommended timing for booster shots may vary depending on factors such as age, underlying health conditions, and the interval since completing the primary vaccination course. Individuals are advised to consult with healthcare professionals or refer to official government guidance for the most up-to-date information on booster shots in Singapore.

Recommendations for COVID Booster Shots in Singapore


As of now, the Singapore Ministry of Health has provided specific recommendations for certain groups to receive COVID-19 booster shots. These recommendations are aimed at providing additional protection to those who may be at higher risk of severe illness or have a greater chance of exposure to the virus. The prioritized groups in Singapore include:


Healthcare Workers: Healthcare workers who have direct contact with COVID-19 patients or have a higher risk of exposure to the virus are recommended to receive it. This includes frontline healthcare personnel, such as doctors, nurses, allied health professionals, and support staff working in healthcare settings.


Vulnerable Individuals: Singapore's vaccination strategy prioritizes vulnerable individuals who are at a higher risk of severe COVID-19 outcomes. This includes elderly individuals aged 60 years and above, individuals with underlying medical conditions, and immunocompromised individuals. These groups are recommended to receive the COVID booster shot to enhance their immune response and protect them against the virus.


Certain Key Workers: In addition to healthcare workers, specific key workers who are involved in essential services and have a higher risk of exposure may also be prioritized for it. This may include individuals working in sectors such as transportation, aviation, border control, and education.


It is important to note that the recommendations for COVID-19 booster shots in Singapore are based on evolving scientific evidence and may be subject to change. The Ministry of Health closely monitors the situation and updates the recommendations accordingly to ensure the highest level of protection for the population.

Affecting an individual's ability to travel internationally


It may have implications for an individual's ability to travel internationally or participate in certain activities. Here are a few key points to consider:


International Travel Requirements: Different countries have varying entry requirements, including those related to COVID-19 vaccinations. It is important to check the specific entry rules and regulations of the destination country before traveling. Some countries may not recognize all COVID-19 vaccines or require additional documentation, such as vaccine certificates or negative test results.


Vaccine Recognition: Each country has its list of approved COVID-19 vaccines. While many widely used vaccines are recognized internationally, it is possible that certain shots may not be listed among the recognized vaccines in some countries. It is advisable to check with the destination country or the relevant embassy or consulate for their recognition and acceptance policies.


Vaccine Certificates and Travel Passes: Many countries and airlines now require individuals to show proof of COVID-19 vaccination through digital or physical certificates. These certificates demonstrate an individual's vaccination status and may also include booster shots. Singapore has implemented the HealthCerts system, which provides digital vaccination certificates. It is crucial to ensure that they are correctly reflected in the vaccination certificates for hassle-free travel.


Local Regulations and Activities: Apart from international travel, some countries may also have local regulations regarding participation in certain activities or events. These may include attending concerts, sports events, conferences, or even visiting specific venues such as theaters, museums, or gyms. It is important to stay updated with the local guidelines and requirements to ensure compliance and a smooth experience.


Temporary Restrictions: Countries may implement temporary restrictions or requirements based on evolving COVID-19 situations. These restrictions can impact travel plans, regardless of vaccination status. It is advisable to monitor government advisories and travel alerts from relevant authorities.



While receiving it in Singapore may have implications for international travel and participation in certain activities, it is essential to stay informed about the specific requirements of the destination country and comply with them accordingly. Checking vaccination certificates, staying updated on local regulations, and monitoring travel advisories will help ensure a seamless travel experience.

Booster Dose Administration


The administration process at vaccination sites is straightforward:


1. Registration


Present ID for identity verification. Overseas-vaccinated individuals should show proof of prior vaccination.


2. Screening


Complete a health screening form to check for potential contraindications or precautions. Those with acute illnesses may be advised to return another time for safety.


3. Informed Consent


Read and acknowledge the information provided on health risks and benefits. For minors, parents consent on their behalf.


4. Vaccination & Observation


The mRNA booster shot is administered. Wait 30 minutes after for observation for any potential allergic reactions before leaving.


5. Updates


Vaccination records will be updated for the booster dose within a day on HealthHub and TraceTogether. An SMS notification is also sent.


It can be conveniently accessed like the earlier doses. Do monitor for any potential post-vaccination side effects.

Benefits of Boosters


Many health benefits stem from getting it:


- Restores waning immunity approximately 5 months after primary series.


- Raises declining antibody levels for more durable protection.


- Reinforces immunological memory so the immune system recognizes the virus.


- Provides up to 75% protection from symptomatic infection.


- Offers stronger defenses against new variants like Omicron.


- Reduces risks of hospitalization or severe illness.


- Provides the highest antibody levels to date for the widest range of immune protection.


- May reduce post-infection long COVID risks though more studies are required.


Don't hesitate to receive it when recommended for reinforced defenses.


Effectiveness Data


Studies in Singapore and globally confirm the benefits:


- Antibody levels drop about 25% every 2 months after primary dosing. Booster restores levels.


- Against Omicron, 2-dose effectiveness was only 20%. Booster raised it to 75%.


- Boosted individuals 5 times less likely to get infected compared to 2 doses.


- Hospitalization risk is 15 times lower for the boosted compared to unvaccinated individuals when infected.


- Over 90% of vaccinated COVID ICU patients in Singapore were un-boosted.


The evidence affirms that booster shots upgrade protection meaningfully.

Booster Side Effects


As subsequent doses, it may trigger some common side effects:


- Pain, swelling, redness at the injection site


- Fatigue, headaches, muscle aches, feverish


- Joint pain, nausea, vomiting


- Enlarged lymph nodes


- General unwell feeling


But most resolve within 1-3 days without treatment. Paracetamol can help relieve fever or pain. Serious adverse events are very rare.


Do see a doctor if side effects worry you. But generally, side effects signal the immune system's response.


Precautions and Special Cases


Some should take extra precautions when getting theirs:


- Immunocompromised: Consult a doctor on optimal timing.


- History of anaphylaxis: Get it only in a clinical setting for closer monitoring.


- Underlying heart conditions: Inform staff before so the procedure can be adjusted.


- Pregnant: Delay it to at least 5 months post-delivery, but still recommended for protection.


- After COVID-19 infection: Defer it for 3 months after for best results.


Do inform the staff during the screening stage for any pre-vaccination precautions that may be warranted.

Role in Singapore's Endemic Transition


The program supports Singapore's journey to live with COVID-19:


- Provides an immunity buffer as social activities increase.


- Uplifts population-level protection as measures ease.


- Allows continued resumption of overseas travel and tourism.


- Eases load on the healthcare system from lower hospitalization rates.


- Enables at-risk persons to safely resume work, schooling, and socializing.


- Maintains high population immunity for sustained reopening.


It enables a safe transition and calibrated resumption of activities.

Availability of COVID Booster Shots

Singapore has been proactive in implementing a booster shot program to enhance the immunity of its population against COVID-19. Here's how the availability of COVID booster shots in Singapore compares to other countries:


Early Implementation: Singapore was one of the early adopters in offering to its citizens. The government recognized the waning effectiveness of the initial COVID-19 vaccinations over time, especially with the rise of new variants. As a result, they swiftly initiated this program.


Eligibility Criteria: Singapore has well-defined eligibility criteria for receiving it. Initially, the program targeted seniors aged 60 and above, as well as individuals with weakened immune systems. Over time, the eligibility criteria expanded to include other groups, such as healthcare workers and individuals at higher risk due to their occupation or health conditions.


Rollout Plan: The Singapore government has established a phased rollout plan for administering it. The plan prioritizes those at higher risk of severe illness or exposure to the virus. This systematic approach helps ensure that they are distributed efficiently and effectively.


Dose Type: Singapore primarily offers mRNA-based booster shots, such as those from Pfizer-BioNTech or Moderna. These vaccines have shown high efficacy in boosting immune responses and providing protection against emerging variants.


Vaccination Coverage: Singapore has achieved a high vaccination coverage rate among its population. As of now, a significant proportion of the population has received their primary vaccination doses and subsequent ones, contributing to a more resilient defense against COVID-19.


Global Comparison: In comparison to other countries, Singapore's booster shot program demonstrates a proactive and well-organized approach to protecting its population against COVID-19. The availability and accessibility are prioritized to ensure that at-risk individuals receive the additional protection they need.


It's worth noting that the availability may vary among different countries due to factors such as vaccine availability, population size, and the overall COVID-19 situation. Singapore's commitment to staying ahead of the virus by offering it reflects its dedication to public health and proactive management of the pandemic.

Future Plans


MOH continuously tracks global data to assess if future boosters are warranted. Some considerations:


- Monitoring immunity duration of boosted population.


- Reviewing severe illness trends among the boosted.


- Evaluating efficacy against circulating and future variants.


- Assessing at-risk groups’ breakthrough infections.


- Advances in variant-specific vaccines or combination vaccines.


For now, there are no concrete plans. However, the policy remains responsive to any changes.


Vaccine Development Process


To understand it, it is helpful to consider the rigorous process involved in developing and validating any new vaccine:


Vaccine Design

Scientists determine the approach whether using a weakened or inactivated form of the pathogen or molecularly engineered immunogens that activate an immune response.


Pre-clinical Studies

Testing first done on cells in the lab followed by animal subjects to evaluate the candidate vaccine’s safety and ability to provoke an immune reaction.


Clinical Trials – Phases 1 to 3

Vaccine given to a small number of human volunteers followed by expanded trials to confirm its safety and efficacy fully before approval.


Regulatory Review

Rigorous review by scientific bodies of all trial data before vaccines are authorized for use. This ensures strict standards.


Manufacturing Scale-up

Technology and processes are adapted to enable mass manufacturing of the vaccine to required quantities. Multiple production facilities help boost capacities.


Post-launch Monitoring

Real-world data from mass vaccination continues to be monitored to detect any adverse events or to determine if boosters may be indicated.


It undergoes similarly rigorous testing and reviews tailored for evaluating subsequent doses before inclusion into national vaccination schedules.


Considerations on Booster Need and Timing


Some key factors guide deliberations on booster shot recommendations:


- Rate of waning immunity based on immune correlates like antibody levels.


- Any resurgence of infections among the vaccinated indicating declining protection.


- Disease severity and hospitalizations among vaccinated groups.


- Signs of increased breakthrough infections in previously well-protected groups.


- Emergence and spread of new variants that evade immune defenses.


- At-risk groups showing greater infections signaling a need for boosters as a priority.


- Data confirming additional doses can safely improve immunity potency and breadth of protection.


- Ensuring adequate global vaccine supplies before broadening booster policies.


Multiple clinical, epidemiological, and scientific data factors are weighed comprehensively when countries calibrate their booster policy for optimal protection.


Booster shots reinforce COVID-19 immunity that declines over time. They provide durable protection and enable a robust reopening. Singapore’s national booster programme has made them conveniently accessible to uplift population immunity to an optimal level.


Don’t hesitate to receive your booster jab for reinforced defenses against the virus. Coupled with living responsibly, boosters give the best protection even as activities resume.