I’m sure I have recently read that there are ‘true Christians’ who consider themselves immune from Covid-19. So I did a search and came up with this site, although I didn’t find any personal claims:
Charismatic Prophet (Another One) Claims Christians Are Immune to Coronavirus
I haven’t bothered researching this in any way, but it doesn’t surprise me that some Christians would hold this immunity view, whether it be with some scriptural support or through faith alone.
If you are one of these individuals, then I would urge you not to deliberately put yourself in harms way. For example, in a crowded situation where social distancing is not possible and face protection is not worn. To do so would amount to tempting God.
Consider Jesus’ example when being tempted by Satan as recorded in Matthew 4:5-6:
“Then the devil taketh him up into the holy city, and setteth him on a pinnacle of the temple,
And saith unto him, If thou be the Son of God, cast thyself down: for it is written, He shall give his angels charge concerning thee: and in their hands they shall bear thee up, lest at any time thou dash thy foot against a stone.”
The temptation here was to go against God’s word to prove a point. But Jesus’ response was “… It is written again, Thou shalt not tempt the Lord thy God.”, quoting Deuteronomy 6:16.
If Jesus wouldn’t do it, then I suggest you shouldn’t.