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In reply to the discussion: New CDC studies point to waning immunity from vaccines [View all]Ms. Toad
(34,127 posts)50. Not quite.
Effectiveness is measured in comparison to unvaccinated cases (not as an absolute).
So given equal exposure, for every 100 cases in the unvaccinated cohort, there will be 20 cases in the vaccinated cohort.
If 20% holds, it is both the greater transmission efficiency of COVID (80% is pretty much what I get when I run the numbers separately).
For normal COVID, the effectiveness was 95% (meaning 5% as many cases as in the unvaccinated population). The early studies showed Pfizer about 88% efficiency against Delta. Delta is about 60% more infectious.
So 100 cases of COVID (original version) turn into 160 cases (delta version). 12%% of 160 cases is 19.2% (pretty close to 20%)
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Here in Florida CVS and Walgreens have been giving boosters. We got them last week.
Sancho
Aug 2021
#15
first of all, I am not sure this is true. My niece has an immune disease and my sis wanted to
Demsrule86
Aug 2021
#10
I am very grateful...that all my family appears to have survived this...the Georgia Governor is
Demsrule86
Aug 2021
#47
The original initial Pfizer efficacy was found to be 95% (against the variants at the time)
BumRushDaShow
Aug 2021
#23
Now I understand. Many exposed people don't get it is what you are saying I think.
Tomconroy
Aug 2021
#40
That is what my sister's doctor told her about my niece who has an immune disease.
Demsrule86
Aug 2021
#49
Most VAX data STILL shows 95% effective against hospitalizations and death even with Delta and
uponit7771
Aug 2021
#42
Data still shows low death rates among children under 12 from CV infection and it shows people at
uponit7771
Aug 2021
#45
Sure, what's another death or two amongst children? It's low, it's not non-existent.
phylny
Aug 2021
#48
You feel the same with driving right? Seeing there are higher chances of a kid getting killed ...
uponit7771
Aug 2021
#51
No one is saying you should take your grandaugter to an outdoor rock concert.
Tomconroy
Aug 2021
#46