The US Centers for Disease Control and Prevention (CDC) recommends that certain immune-compromised adults and people over the age of 50 have another mRNA Covid-19 booster dose at least four months following the first. The action will strengthen protection for these vulnerable groups against serious sickness caused by Covid-19.
The CDC's announcement came only hours after the US Food and Drug Administration approved a second booster dosage of either the Pfizer-BioNTech or Moderna Covid-19 vaccines for these individuals on Tuesday.
Adults who had a primary immunisation and booster dose of Janssen Covid-19 vaccine from Johnson & Johnson at least 4 months ago may now obtain a second booster dose utilising an mRNA Covid-19 vaccine, the CDC said. It said, people who were boosted were 21 times less likely to die from Covid-19 than those who were not, and 7 times less likely to be hospitalised during the recent Omicron surge.
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