I rarely post messages on ThaiVisa (I think 6 times) but thought I had something to share that some may find interesting. I spend only 6 weeks in SE Asian in a year and only 10 days of this time is in Thailand. I am a 75 year old male living full time in San Diego CA and spend considerable time at my home in Mazatlan Mexico. I stayed away from Mexico until I was fully vaccinated (Feb, 2021), at which time I started flying again from Tijuana, MX to Mazatlan at least once a month. I took the usual precautions ie face mask, social distancing, staying away from crowds as much as I could. Regardless, I developed very mild symptoms in May of headache, chills, fever (only 99.8), nasel congestion/runny nose, sweating, insomnia, all mild by the way and lasted about 6 days. All symptoms very mild and I wrote it off as just a seasonal cold or flu. Then 3 days ago got the same symptoms again but now mild to moderate symptoms. I tested positive for Covid yesterday. Though so much more needs to be learned from about this virus and the effect of the vaccinations on the virus, my doctor says there is no doubt that without the vaccine I would be in the hospital now fighting for my life. I tend to agree, as I concentrate on the symptoms it just seemed that the virus was just trying so hard to move down from my nasel passages to my throat and then chest but was blocked by the vaccine. My doctor and I discussed my symptoms in May and then recently what I am experiencing now and he thinks there is a chance I was infected with two different variants but just speculating. I probably will share my experiences with Phizer just to see if they might learn something or even recommend a booster. Just in case you are wondering, I believe that I was infected both times on the flight to or from Mexico. Jam packed, shoulder to shoulder. Finally the reason for this post is for those that are on the fence whether to get or not get the vacs, do think it through carefully because death is so final.