p Dr. Dennis Y. Fong, M.D.
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Covid Advice #17 (10/30/2021):
Boosters, Travel, Winter

- from Dr. Dennis Fong -


On October 20, the FDA has approved 6 month Moderna and Jansen boosters for:

The FDA has also approved mix-and-match boostering for all three vaccines.

You can find the FDA's announcement here: FDA announcement.

Again, I think the booster is a good idea.


When you fly, keep your N95 mask on so you don't catch it from the person next to or right in front of or behind you. Also, turn the air on full and have it blow directly down in front of you so it keeps the other person's breath away from you especially when he or you take off the mask to eat or drink.

For eating maybe tell the person next to you to eat first, then you will start eating after they have finished and put their mask back on.

By the way, I think flying to another country direct might be safeer than flying domestically, since everyone has to have a negative test to board and most countries require vaccinated status to enter.


The good news is that since mid September to now, end of October, in both Contra Costa and California, and since Oct 10 or so for the whole country, Covid cases per day has been dropping. Still, for all three places, we are higher these last two months of September and October 2021 than the same two months in 2020, when there was no vaccine yet. I think Delta has made the difference. And only 58% of the US is fully vaccinated as of yesterday, and only 61% of California. Contra Costa is luckier with 74%. Even for the vaccinated, the more Covid there is out there, the more breakthroughs there will be. Hopefully I will be wrong, but with more Covid than last fall, this winter could be significantly worse than last winter, especially for the unvaccinated.

So like I said before, get vaccinated, get your booster, and even if vaccinated, keep your mask on, social distance, clean your hands, and clean or quarantine objects, especially cold foods. You don't want to get infected, whether you are vaccinated or not, because there's serious Covid and long Covid. While vaccines do protect you against both, it's not 100%.

Wish you happiness! Stay healthy and stay safe!

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