I seem to remember one oral drug / supplement having a side effect of lowering your immunity to infections. I thought it was Pentox but can't find any supporting evidence for this.
Am I totally making things up or does this ring a bell for anyone? Maybe it was viagara or NSAIDs? With Coronavirus spreading and lots of upcoming travel, I want to be sure I'm not putting myself in a highly risky situation.
For peace of mind I would get me some Zinc Acetate, it's absorbable 100%, lozenges by Life Extension, for example :), don't taste pleasant, but they work!
Paul.