Professor Matteo Bassetti, head of an infectious disease clinic at the Italian Policlinico San Martino Hospital, argues that the coronavirus becomes less deadly as it spreads. He does not rule out that the virus has died out before (and if) a vaccine is ready.
Bassetti told The Sunday Telegraph that he has recently seen older patients recover who would normally have died at the onset of the pandemic.
“Even patients aged 80 or 90 are now sitting upright in bed and breathing without help. The same patients would have died two or three weeks earlier. The corona virus was an aggressive tiger in March, but now it is a wild cat. “The picture of the virus has” changed completely “over the past four weeks, according to Bassetti.
It is not the single explanation. It can be explained by making an assumption that COVID reinfects people with at least some immunity left of the previous infection.