The spread of Sars-Cov2
The virus is transmitted by air, through droplets produced by the breath or simply by talking or coughing. Sometimes the…
The effects of Covid-19
Although several people with Covid-19 are asymptomatic (they don’t have symptoms caused by the infection), many others are not and…
The origin of the new virus
Over the past year we have been forced to remain indoors or to be able to go out only with…