Hi ejbriel, thank you for your smart idea. That was exactly what I was thinking today. I have been suffering from gastrointestinal symptoms for three weeks now, after I had visited France near the Mulhouse Corona hotspot. No breathing, flu, fever, or coughing symptoms. However, I wondered why I am still suffering from prolongued GI problems and a (very) slighty burning throat for three weeks by now. Never had similar symptoms before; no underlying health problems. My taste buds and smell is ok, albeit somewhat compromised by the throat burning. I had also very short and very slight neck pain 3 weeks ago. By then there was no mention of atypical symptoms. While reading the news during the past few days, I wondered whether I might still have been slightly caught by the Coronavirus back then, primarily being infected in the GI tract. After 3 weeks have elapsed, I should be on the safe side by now, being immunized by an "informal" GI vaccination. Hopefully there is a barrier between the GI tract and the breathing system similar to the blood-brain barrier. If so, one could theoretically "vaccinate" a person with a low live-dose of Coronavirus via a suppository into the GI tract. However, I am not a doctor, just my two cents.