MANAMA: In line with medical research, the National Taskforce for Combating the Coronavirus highlighted the importance of taking a booster dose within a maximum of six months after receiving the second dose of the Pfizer-BioNTech or AstraZeneca Covid-19 vaccine.
Data from a study showed a decrease in the effectiveness of the Pfizer-BioNTech vaccine in the month following the second dose from 88 per cent to 74pc, while the effectiveness of the Covishield-AstraZeneca vaccine decreased from 77pc to 67pc after four to five months after taking the second dose .
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