SINGAPORE, Dec 20 (The Straits Times/ANN): There has been no increase in the frequency of side effects among people who got their Covid-19 vaccine booster shots, said the Health Sciences Authority (HSA) on Monday (Dec 20).
It has received 304 adverse event reports linked to booster shots of the Pfizer-BioNTech/Comirnaty vaccine, and another 87 reports linked to the Moderna/Spikevax vaccine.
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