The third dose should be the same mRNA vaccine - Pfizer-BioNTech and Moderna - as the primary shots and are to be administered four weeks after completing the primary vaccination. And studies cited by CDC in support of this new recommendation showed 40-44% of hospitalised breakthrough cases - those contracting Covid-19 despite being fully vaccinated - were immunocompromised. Delta pushes cases upMeanwhile, the seven-day average of Covid-19 deaths in the US reached 645 on Friday, almost doubling in two weeks to reach the highest point since May, as the Delta variant pushes deeper into the country. Australia’s most-populous city Sydney tightened restrictions as the Delta variant of the coronavirus spreads throughout the country. Iranian state media says authorities will impose a six-day “general lockdown” in cities across the country in an effort to curb the Delta variant.

Source: Hindustan Times August 14, 2021 23:25 UTC