It is time to take care of the aerial transmission of the Covid-19 " write 239 international scientists in an article calling on the authorities of health of the planet and in particular the world Health Organization (WHO) to recommend active ventilation of indoor public spaces.

at this day, WHO and other health authorities, including those of the United States, believe that the coronavirus responsible for the disease Covid-19 is mainly transmitted by droplets projected by coughing, sneezing and speaking directly into the faces of people nearby, or present on surfaces where they can survive for hours or days.