The COVID vaccine (boost) starts to have some effect after about one week, and it really kicks in weeks 2-4- this is based off of studies where the vaccinated people didn't have immunity to the virus. Now, everything is different, with most infected with omicron- and data I am seeing indicates that antibodies will last a long time after a vaccine if someone was infected first. I'm hopefully protection (even from infection itself, which we know this vaccine can do) will last longer than ever: 6months --> 1+ years, for most people after this bivalent booster shot.
Flu is different. The vaccine isn't as effective at stopping flu as COVID vaccines are at stopping SARS-CoV-2. I've always been kinda meh on getting one, but it will most certainly reduce how sick you feel if you get infected so totally worth it. I got my COVID booster 3 weeks ago and I'll probably get the flu shot soon.
Flu is different. The vaccine isn't as effective at stopping flu as COVID vaccines are at stopping SARS-CoV-2. I've always been kinda meh on getting one, but it will most certainly reduce how sick you feel if you get infected so totally worth it. I got my COVID booster 3 weeks ago and I'll probably get the flu shot soon.
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