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Scientists around the world are relentlessly investigating the coronavirus, a very powerful enemy of which little is known. For example, how it interacts with the smoking.

A study by scientists at the Cold Spring Harbor Laboratory (USA) and published by the journal Developmental Cell reveals that cigarette smoke stimulate the lungs to produce more ACE2, the protein that the coronavirus uses to enter human cells.

This would explain why smokers are especially vulnerable to severe Covid-19 infections.

The study reveals that the change is reversible, and give up smoking It could reduce the risk of a serious case of coronavirus.

Since the pandemic began, three groups worldwide have been found to be especially prone to developing serious illness: men, the elderly and smokers.

In tests on mice, the researchers concluded that those who had been exposed to smoke in a laboratory had a significant increase in ACE2 regulation.