While antibodies produced by the Pfizer vaccine were not as effective against Omicron as against the original virus, antibodies produced by people who had been vaccinated and previously infected, showed relatively high neutralisation. According to Pfizer, three doses of its vaccine could neutralise the virus – but also that two doses produce far fewer antibodies.
OMICRON is the fifth and latest Covid-19 variant of concern today. Three doses of a vaccine (or two doses plus immunity gained from infection) may produce sufficient antibodies to quash this unwelcome viral newcomer.
Omicron, found today in close to 100 countries, has sparked deep concern since it was reported to the World Health Organisation (WHO) in November.
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