QUOTE(redracer2004 @ Jan 25 2022, 08:30 PM)
Why? I got AAA ... no side effects other than sleepy and weak.... Got it since last Thursday....still feeling sleepy
Pfizer/Moderna is mRNA vaccine while AZ is adenovirus vaccine, mixing the two = even more effective.
https://codeblue.galencentre.org/2021/11/25...ine-recipients/QUOTE
In South Korea, where SK Bioscience produces Covid-19 vaccines for AstraZeneca, the Korea Disease Control and Prevention Agency (KDCA) also recommends booster vaccinations with an mRNA vaccine made by Pfizer or Moderna for AstraZeneca recipients.
Once can't truly test this out of course unless they get Covid.
My point being if you're cautious and take necessary precautions, a year after the booster = all booster shots efficiency may just reach the same level of effectiveness.
Of course, having a booster is better than not having a booster.
Logically also, opt for AZ or Pfizer booster only and not Sinovac booster.
I don't like the hassle of cancelling and then being on the waiting list etc... so I might just take AZ booster.