Connect with us

Coronavirus (Covid-19)

Sinovac and AstraZeneca: The 2 primary Covid-19 vaccines in Thailand




Photo via Facebook/ อนุทิน ชาญวีรกูล (Public Health Minister)

Since Thailand started its mass Covid-19 immunisation campaign in late February, the Chinese-made Sinovac vaccine and the AstraZeneca vaccine, made in partnership with the UK’s Oxford University, have been used to vaccinate residents in Thailand.

The local firm Siam Bioscience is now producing the AstraZeneca vaccine and the first Thai-made batch is expected to be rolled out next month.

Type of vaccine

AstraZeneca: A recombinant vaccine from a modified chimpanzee adenovirus.

This is a harmless, weakened adenovirus that usually causes the common cold in chimpanzees. The adenovirus vaccine vector, known as ChAdOx1, was chosen as a suitable vaccine technology for a SARS-CoV-2 vaccine as it has been shown to generate a strong immune response from one dose in other vaccines. It has been genetically changed so that it is impossible for it to grow in humans. – Australian Department of Health

Sinovac: An “inactivated” vaccine, using inactivated virus particles to produce an immune response, a traditional approach for vaccines and the same technology used to produce the flu and polio vaccines.

The World Health Organisation says the vaccine is made by inactivating or killing the virus using chemicals, heat or radiation.


Studies are still underway for both vaccines, while more studies of the AstraZeneca vaccine have been completed and reported. In Thailand, a recent study by Chulalongkorn’s Centre for Excellence in Clinical Virology of the Faculty of Medicine found both vaccines effective after both doses.

According to the university study…

  • 99.49% of Sinovac recipients developed antibody reponses 4 weeks after their second injection.
  • 97.26% of AstraZeneca recipients developed antibody responses 4 weeks after their first injection.

Thailand initially used the Sinovac vaccine for people ages 18 to 59 due to limited research for the 60 and up age group. Thai health officials recently announced that recent studies show the Sinovac is safe and effective for adults over 60 years old who are in good health.

Global travel

A dilemma for many expats living overseas, or those wanting to travel in the future, is which Covid-19 vaccine to get as some are not recoginsed by other countries.

Both Sinovac and AstraZeneca have met the World Health Organisation’s criteria for safety and efficacy. The Sinovac vaccine is awaiting final approval.

Some countries may not recognise certain vaccine passports, although international tourism is still in the early stages and proposed regulations are constantly changing.

Thailand recoginses vaccines that are either approved by the World Health Organisation or by the Thai government.

The European Union plans to reopen tourism to American travellers, but they may need to have a vaccine approved by the European Medicines Agency.

Sinovac and AstraZeneca: The 2 primary Covid-19 vaccines in Thailand | News by ThaigerSinovac and AstraZeneca: The 2 primary Covid-19 vaccines in Thailand | News by ThaigerSOURCES: WHO | Healthline


Get more from The Thaiger

📱 Download our app on Android or iOS
👋 Have your say on our Thailand forum
🔔 Subscribe to our daily newsletter
📺 Subscribe / Join for daily shows
👍 Like/Follow us on Facebook
🐦 FOLLOW us on Twitter
📷 FOLLOW us on Instagram


Join the conversation and have your say on Thailand news published on The Thaiger.

Thaiger Talk is our new Thaiger Community where you can join the discussion on everything happening in Thailand right now.

Please note that articles are not posted to the forum instantly and can take up to 20 min before being visible. Click for more information and the Thaiger Talk Guidelines.

Local Thai journalist speaking fluent Thai and English. Tanutam studied in Khon Kaen before attending Bangkok’s Chulalongkhorn University.

Follow Thaiger by email:

Thailand12 hours ago

Thailand News Today | Legalized gambling in Thailand? PM reveals his Omicron policy stance | Dec 3

South12 hours ago

All 23 districts declared as disaster zones in Nakhon Si Thammarat

Bangkok12 hours ago

Police face criticism over plans to buy millions of baht worth of tear gas and riot gear

Thailand13 hours ago

Tourism minister tells the public “not to worry” about Omicron

Malaysia13 hours ago

Malaysia reports first case of Omicron variant

Thailand13 hours ago

Thai Immigration launches online 90 day report system

Join the conversation on the Thaiger Talk forums today!
Visa13 hours ago

10-year long term visa scheme takes a step forward, measures approved by PM

Thailand14 hours ago

Pilot seriously injured in F-5 fighter jet crash in Lop Buri

Southeast Asia15 hours ago

Taiwan sets up nighttime vaccination spots with gifting plans

Tourism15 hours ago

Maya Bay reopening likely to be postponed | VIDEO

Contract Package15 hours ago

Thai AirAsia X seeks for new investors as flights to resume next year

Thailand15 hours ago

Government to set up committee to consider opening casinos in Thailand

Southeast Asia16 hours ago

Detained Cambodian monk with refugee status says he could jailed if deported from Thailand

Thailand16 hours ago

Wildlife officials search for Bengal tiger roaming across three provinces

Thailand16 hours ago

CCSA criticises newspaper’s ‘hunt for Africans’ story, clarifies efforts to track travellers

Thailand3 months ago

Morning Top Stories Thailand | Police to end protests, Human Trafficking | September 14

Thailand9 months ago

Thailand News Today | Thai Airways in rehab, All go for Songkran | March 4

Tourism9 months ago

Phuket’s nightlife. Yes, bars and clubs are still open | VIDEO

Phuket9 months ago

Thailand News Today | Covid passport talks, Thai Airways heads to court | March 2

Tourism9 months ago

Phuket Thai food treats you need to try | VIDEO

Thailand9 months ago

Thailand News Today | Bars, pubs and restaurants ‘sort of’ back to normal | Feb 23

Tourism9 months ago

In search of Cat & Dog Cafés in Phuket Town | VIDEO

Thailand11 months ago

Thailand News Today | Gambling crackdown, Seafood market to reopen, Vlogger challenge | Jan 21

Thailand11 months ago

Thailand News Today | Covid testing for visas, Business impact, Vaccine approval | January 19

Thailand11 months ago

Thailand News Today | Weekend Bangkok bombs, Thailand fires, Covid update | January 18

Thailand11 months ago

Thailand News Today | Stray car on runway, Indonesian quake, 300 baht tourist fee | January 15

Thailand11 months ago

Thailand News Today | Governor off respirator, sex-trafficking arrest, condo prices falling | January 14

Thailand11 months ago

Thailand News Today | Chinese vaccine, Thailand ‘drug hub’, Covid update | January 13

Thailand11 months ago

Thailand News Today | Bangkok may ease restrictions, Phuket bar curfew, Vaccine roll out | January 12

Thailand11 months ago

Thailand News Today | Covid latest, Cockfights closed down, Bryde’s Whale beached | January 11