Thailand Says Pfizer Spurs Top Response After Sinovac, Astra Jab
- Second shot using mRNA vaccine is good combo with other types
- Thailand was first to use Sinovac-then-Astra regime for Covid
Photographer: Vincent Kalut /Photonews/Getty Images
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One of Thailand’s main Covid-19 vaccine regimes generates a lower immune response than inoculation combinations that include an mRNA-based dose, according to a study by the Siriraj Institute of Clinical Research.
Preliminary results showed that a Sinovac Biotech Ltd. vaccine as a first shot followed by an AstraZeneca Plc jab -- a pairing widely used in Thailand -- elicited a weaker immune response than a two-dose regime in which Pfizer Inc.’s vaccine was administered as the second shot four weeks after an initial jab of either Sinovac or Astra, the study said.