'"PARIS — French researchers are preparing to launch a human trial to test their hypothesis that nicotine can help the body combat the COVID-19 infection.
...The trial is a follow-up to a French study, published this month, of public health data which appeared to show that PEOPLE WHO SMOKE ARE 80% LESS LIKELY TO CATCH COVID-19 THAN NON-SMOKERS of the same age and sex."
The scientists hypothesized in their study that nicotine, which is contained in cigarettes, could influence whether or not the coronavirus molecules are able to attach themselves to receptors in the body.
“You have the virus which arrives on the receptor, and the nicotine blocks that, and they separate,” said Jean-Pierre Changeux, emeritus professor of neuroscience at France’s Pasteur institute...'
Not just asymptomatic, but immune. They don't contract it so they're not carriers either.