Yeah airports are a hotbed of viruses. Theres a couple nasal sprays that work as a prophylactic and I never go anywhere without them. Apparently carrageenan sprayed in your nose works exceptionally well.
https://biologyinsights.com/covid-19-nose-spray-how-it-works-and-is-it-effective/
Under terrain theory, I don't think viruses exist. I don't believe that they've ever isolated a virus or proven that an infected person can pass it to a healthy person.
It says that what's happening is your body has become overwhelmed with toxin & it needs to get it out of you. Hence the mucous, vomiting & other excretions.
I'm not sure if I completely buy it, but it starts to make a lot of sense when you look at viral treatments. Many may not be killing the virus, so much as denaturing/oxidising the toxin to get it out of your body.
Chlorine dioxide is a treatment that immediately comes to mind.
🤷
