25-02-2021, 10:04 AM
3
Re: 95% Efficacy
Originally Posted by Dextrous63
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Quick question. I know how a vaccine's efficacy rate is determined and hence what it means.How many members on here also understand it? Do you want it explained in simple terms?
25-02-2021, 10:05 AM
4
Re: 95% Efficacy
Originally Posted by poobear
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yes i understand the word efficacy and no i don't want it explained - thank you for asking and offering.
25-02-2021, 10:17 AM
5
Re: 95% Efficacy
Originally Posted by Dextrous63
->
Quick question. I know how a vaccine's efficacy rate is determined and hence what it means.How many members on here also understand it? Do you want it explained in simple terms?
But please make it very simple...and as a you are a teacher...I know you will be very patient with me, if I don’t understand,when I ask further questions.
I am a very slow learner, takes a while for me to grasp stuff....
I also think this thread is very thoughtful and considerate,in trying to help others understand.....
A teacher ,never stops teaching, that is your calling,imo.
25-02-2021, 12:00 PM
9
Re: 95% Efficacy
It's more to do with how they get the figure 95%.I'll use the proportions they got and create a different sample size to keep the numbers easier to follow.
Take one group (A) of 10000 people and vaccinate them.
Take another group (B) of 10000 and give them a placebo.
Wait for a while and then see what happens (ideally, you'd like to inject the virus into all 20000 people, but this clearly can't be done due to you likely killing people, so you'll just have to rely on "normal" exposure).
4 people in group A tested positive.
74 people in group B tested positive.
So, the vaccine "prevented" 70 people from catching the virus in group A.
70 out of 74 = 95%.
That's how they get their efficacy rate.
25-02-2021, 12:11 PM
10
Re: 95% Efficacy
Originally Posted by Dextrous63
->
It's more to do with how they get the figure 95%.I'll use the proportions they got and create a different sample size to keep the numbers easier to follow.
Take one group (A) of 10000 people and vaccinate them.
Take another group (B) of 10000 and give them a placebo.
Wait for a while and then see what happens (ideally, you'd like to inject the virus into all 20000 people, but this clearly can't be done due to you likely killing people, so you'll just have to rely on "normal" exposure).
4 people in group A tested positive.
74 people in group B tested positive.
So, the vaccine "prevented" 70 people from catching the virus in group A.
70 out of 74 = 95%.
That's how they get their efficacy rate.
Someone once said "you can prove anything with statistics"
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