vivek murthy

Why is the Delta variant spreading so quickly?
The Delta variant replicates rapidly in cells, infected people have a short incubation period, the virus is concentrated in the upper respiratory tract so it is easily spread into
What is the most lonely human being?
People are becoming lonely. Dr. Vivek Murthy, a former US physician, said loneliness could shorten the same lifespan of smoking 15 cigarettes a day.