Border

According to the Drs. and scientists, not people in an rv forum,the efficacy does decrease over time. I have seen 6 or 8 months as a possibility. A booster shot would probably be required. These professionals think that an annual shot may be required. If that is what it takes to stay healthy what is the big deal. We get an annual flu shot. Being as this is a Forum on Rv ing in Mexico this chart shows mortality rates.
https://coronavirus.jhu.edu/data/mortality

This thread will probably be closed. The Mod is probably getting g a lot of posts that have to be deleted.