Recognizing Overseas COVID-19 Vaccinations

We are offering service on serology testing and updating of overseas COVID-19 vaccination records into National Immunization Registry (NIR). This test cost $50-65 depending on the type of vaccine you received overseas.

You will need to present your Singapore identification card, overseas identification document and proof of vaccination to our staff upon registration. This includes either partial or complete COVID-19 vaccination received overseas.

We will perform the appropriate serology testing to confirm that you have undergone effective vaccination. The serology test will detect antibodies generated in response to the vaccine. As most COVID-19 vaccines are based on the spike (S) protein of the SAR-CoV-2 virus, a serology test that detects anti-S antibodies is generally used. An anti-N (nucleocapsid) serology test is used for persons vaccinated with inactivated virus vaccine.

The specimen will be sent to a laboratory for processing and the test results will be out in 3 working days.

A positive serology result implies that you have undergone an effective vaccination and your vaccination record will be ingested into NIR. It takes 1 to 2 weeks for the TraceTogether (TT) app to be updated.

A negative serology result implies that the overseas vaccination was not effective and may not protect from COVID-19 infection. We advise that you take the vaccination in Singapore by checking your eligibility and registering at or call the MOH COVID-19 hotline at 1800-333-9999 for assistance.

There are no known safety issues with re-taking the COVID-19 vaccination. However, some may experience more noticeable side effects such as injection site pain, muscle aches and fever.