On March 29, US top health authorities approved fourth doses of Pfizer and Moderna's Covid-19 vaccine for people aged 50 and over amid a more contagious version of omicron and a new wave of infections in the US, CNBC reported. The FDA cleared Pfizer...
New rules for entering the United States close the doors for those fully vaccinated with the Russian Sputnik V vaccine, according to the Washington Post. Last week, the United States announced it would soon open its doors to foreign travelers vaccinated against the coronavirus, for the first time since ...