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.

'Risk increased from new variants of Corona,' big warning from WHO

Novovax's corona vaccine gets approval from DCGI, children of this age will be vaccinated"

India's COVID vaccination milestone epitome of power of 'Sabka Prayas': Mandaviya