Take it with a shovel of salt, but I've read the following speculative claim: Nicotine docks to a kind of receptor that is also used by COVID-19, thereby denyin

Take it with a shovel of salt, but I've read the following speculative claim: Nicotine docks to a kind of receptor that is also used by COVID-19, thereby denying opportunity to the Virus. But at the same time, habitual smokers tend to develop a higher density of these receptors. That would make smokers less susceptible while they can smoke regularly, but more susceptible upon smoking cessation.