Countries giving Pfizer as booster for those fully vaccinated with Sinovac:

🇸🇬 Singapore
🇹🇭 Thailand
🇮🇩 Indonesia
🇹🇷 Turkey
🇭🇰 Hong Kong
🇧🇷 Brazil

— Aysha Ridzuan (@ayshardzn) October 22, 2021

The green light from CDC Director Rochelle Walensky means that nearly 100 million Americans at risk of severe disease can choose any of the three boosters now authorized in the U.S. regardless of their original shot.

Here’s what you need to know: https://t.co/EhP2342Tbq

— The Washington Post (@washingtonpost) October 22, 2021

Regulators have authorized “mix-and-match” booster shots for anyone over the age of 65, adults with underlying conditions that put them at high risk of serious covid-19 infections, and front line workers over the age of 18. https://t.co/EhP2342Tbq pic.twitter.com/Fs02xFG9Y6

— The Washington Post (@washingtonpost) October 22, 2021

The jury is still out on whether a covid infection provides enough lasting immunity to forego a booster shot.

An immune system that has to fight the virus certainly produces antibodies, but those antibodies may fade away with time. https://t.co/EhP2342Tbq pic.twitter.com/H4sDeChiJy

— The Washington Post (@washingtonpost) October 22, 2021

“We really want everybody to think about it like topping off your antibody levels, like topping off the tank before winter comes,” said Jeanne Marrazzo, director of the division of infectious-disease at the University of Alabama at Birmingham. https://t.co/EhP2342Tbq

— The Washington Post (@washingtonpost) October 22, 2021

2. Meanwhile, Health DG Dr Noor Hisham says the NPRA has approved off-label usage for the mix-and-match combination of Pfizer booster doses for Sinovac recipients.

He says the Institute for Clinical Research will conduct a study for a year on the efficacy and side effects.

— BFM News (@NewsBFM) October 22, 2021