We won’t know ‘for many months to a year’ how long immunity will last for recovered Covid-19 patients, Anthony Fauci said Tuesday. Fauci, the Director of the National Institute of Allergy and Infectious Diseases at the National Institutes of Health…

The World Health Organization said on Thursday it doesn’t rule out the possibility of airborne transmission in crowded areas or indoor venues with poor ventilation, in an update of a scientific brief. However, the Geneva-based body said more research is…