Covid-19 vaccine efficacy?

[ronki23]

If a vaccine reduces likelihood of getting Covid-19 then why are we still recommended to wear masks after vaccination ?

If 100 people were vaccinated from Covid then 66 (Janssen) to 95 (Pfizer / Moderna) won't get Covid and 5 to 33 out of that 100 will.

They say herd immunity is 60 to 75% so if 60- 75 people were vaccinated then out of 100 people 40 (66% Janssen efficacy x 60 percent jabbed) to 67.5 (95% Pfizer / Modern x 75 percent jabbed) won't get it.

That still means 32.5 to 60 % of people will still get Covid regardless of whether they are or aren't vaccinated because the vaccines are not 100% effective.

If sample size is 100 then 32.5-60 x 3% means instead of 3 people out of 100 dying from Covid, 2 will die from Covid after jabbing 60-75%.

Have I made an error in my calculations somewhere ?

 

[ChristineM]

If a vaccine reduces likelihood of getting Covid-19 then why are we still recommended to wear masks after vaccination ?

If 100 people were vaccinated from Covid then 66 (Janssen) to 95 (Pfizer / Moderna) won't get Covid and 5 to 33 out of that 100 will.

They say herd immunity is 60 to 75% so if 60- 75 people were vaccinated then out of 100 people 40 (66% Janssen efficacy x 60 percent jabbed) to 67.5 (95% Pfizer / Modern x 75 percent jabbed) won't get it.

That still means 32.5 to 60 % of people will still get Covid regardless of whether they are or aren't vaccinated because the vaccines are not 100% effective.

If sample size is 100 then 32.5-60 x 3% means instead of 3 people out of 100 dying from Covid, 2 will die from Covid after jabbing 60-75%.

Have I made an error in my calculations somewhere ?

 

[Wandering Monk]

If a vaccine reduces likelihood of getting Covid-19 then why are we still recommended to wear masks after vaccination ?

If 100 people were vaccinated from Covid then 66 (Janssen) to 95 (Pfizer / Moderna) won't get Covid and 5 to 33 out of that 100 will.

They say herd immunity is 60 to 75% so if 60- 75 people were vaccinated then out of 100 people 40 (66% Janssen efficacy x 60 percent jabbed) to 67.5 (95% Pfizer / Modern x 75 percent jabbed) won't get it.

That still means 32.5 to 60 % of people will still get Covid regardless of whether they are or aren't vaccinated because the vaccines are not 100% effective.

If sample size is 100 then 32.5-60 x 3% means instead of 3 people out of 100 dying from Covid, 2 will die from Covid after jabbing 60-75%.

Have I made an error in my calculations somewhere ?

It would be helpful to know what your sources are for the above statistics, then to determine if those numbers were for the native and Alpha variant or for Delta.

 

[ronki23]

It would be helpful to know what your sources are for the above statistics, then to determine if those numbers were for the native and Alpha variant or for Delta.

Using the efficacy for the initial (Chinese) variant so it may even be less for Delta et al

 

[Secret Chief]

If a vaccine reduces likelihood of getting Covid-19 then why are we still recommended to wear masks after vaccination ?

Are you against seat belts and anti lock brakes?

No vaccine is 100%. I thought this was a universally known fact. Perhaps not.

 

[Unveiled Artist]

If a vaccine reduces likelihood of getting Covid-19 then why are we still recommended to wear masks after vaccination ?

If 100 people were vaccinated from Covid then 66 (Janssen) to 95 (Pfizer / Moderna) won't get Covid and 5 to 33 out of that 100 will.

They say herd immunity is 60 to 75% so if 60- 75 people were vaccinated then out of 100 people 40 (66% Janssen efficacy x 60 percent jabbed) to 67.5 (95% Pfizer / Modern x 75 percent jabbed) won't get it.

That still means 32.5 to 60 % of people will still get Covid regardless of whether they are or aren't vaccinated because the vaccines are not 100% effective.

If sample size is 100 then 32.5-60 x 3% means instead of 3 people out of 100 dying from Covid, 2 will die from Covid after jabbing 60-75%.

Have I made an error in my calculations somewhere ?

Short answer they say it's for extra protection. Some get vaccinated, wear a mask, and a shield. I feel it has less to do with the vaccine and more to do with people and fear.

 

[ronki23]

Short answer they say it's for extra protection. Some get vaccinated, wear a mask, and a shield. I feel it has less to do with the vaccine and more to do with people and fear.

Are you against seat belts and anti lock brakes?

No vaccine is 100%. I thought this was a universally known fact. Perhaps not.

So the herd immunity of 60-75% is nonsensical ? It must be higher ?

 

[Jayhawker Soule]

If a vaccine reduces likelihood of getting Covid-19 then why are we still recommended to wear masks after vaccination ?

Here.

 

[Unveiled Artist]

Are you against seat belts and anti lock brakes?

No vaccine is 100%. I thought this was a universally known fact. Perhaps not.

No, but if someone gave you a pill that just came off the market to prevent an illness you don't know you have (yet?) that's different than just seatbelts and antilock breaks.

 

[mikkel_the_dane]

If a vaccine reduces likelihood of getting Covid-19 then why are we still recommended to wear masks after vaccination ?

If 100 people were vaccinated from Covid then 66 (Janssen) to 95 (Pfizer / Moderna) won't get Covid and 5 to 33 out of that 100 will.

They say herd immunity is 60 to 75% so if 60- 75 people were vaccinated then out of 100 people 40 (66% Janssen efficacy x 60 percent jabbed) to 67.5 (95% Pfizer / Modern x 75 percent jabbed) won't get it.

That still means 32.5 to 60 % of people will still get Covid regardless of whether they are or aren't vaccinated because the vaccines are not 100% effective.

If sample size is 100 then 32.5-60 x 3% means instead of 3 people out of 100 dying from Covid, 2 will die from Covid after jabbing 60-75%.

Have I made an error in my calculations somewhere ?

You want the honest answer. It is 3 things. Masks helps you from spreading it to other humans and apparently give you a 5% better chance of avoiding getting infected yourself.
But here is the 3rd reason. Every time a new human gets infected it increases the chance that we get an even worse variant of Covid-19.
We are in effect because of that Covid-19 is new to humans trying to get it under control so it doesn't mutate to something even worse.

 

[sun rise]

If a vaccine reduces likelihood of getting Covid-19 then why are we still recommended to wear masks after vaccination ?

The word is "reduces". Wearing masks reduces the chance of getting Covid. Vaccination reduces the chance of getting Covid. They work together so those who wear masks, especially KN95/N95, are much less likely to get Covid.

The county I live in, has a much higher vaccinate percentage than many other places (82% partially, 76% fully) vaccinated. We are also under a mask mandate. The results can be seen in this image that shows unvaccinated people with much higher infection rates. And the county is now approximately stable in the new case rate while ICUs are full in less vaccinated states.

https://www.coronavirus.cchealth.org/vaccine-dashboard

 

[Unveiled Artist]

So the herd immunity of 60-75% is nonsensical ? It must be higher ?

How does herd immunity percentage relate to vaccines not working 100%?

 

[sun rise]

No, but if someone gave you a pill that just came off the market to prevent an illness you don't know you have (yet?) that's different than just seatbelts and antilock breaks.

Huh? I don't understand that statement. Vaccines prevent illness or make it milder just like seatbelts do for auto crashes.

 

[ronki23]

How does herd immunity percentage relate to vaccines not working 100%?

You need to vaccinate way more than 75% if the vaccines aren't 100%

 

[Secret Chief]

So the herd immunity of 60-75% is nonsensical ? It must be higher ?

Maybe, I haven't really concerned myself with that notion. As I understand, to aim for herd immunity with such a deadly disease and from the get go would necessitate an appalling death rate. Which is why the UK government quickly dropped the idea (and insisted it was never the plan).

 

[ronki23]

Maybe, I haven't really concerned myself with that notion. As I understand, to aim for herd immunity with such a deadly disease and from the get go would necessitate an appalling death rate. Which is why the UK government quickly dropped the idea (and insisted it was never the plan).

Herd immunity, not herd community

 

[Unveiled Artist]

Huh? I don't understand that statement. Vaccines prevent illness or make it milder just like seatbelts do for auto crashes.

I re-read it. Freidan slip. But the idea is getting the vaccine to prevent the spread to others. So, the analogy only works if there is someone in the passenger seat. If it's just the driver of course seatbelts will help to lessen the severity of an accident but that's just regarding the driver. The mantra is its not about oneself but about others.

You can't prevent the passenger from getting into a car crash by wearing your seatbelt. The analogy doesn't work since masks are said to prevent others from getting sick from you-wearing seatbelts helps you not the person beside you.

 

[Secret Chief]

No, but if someone gave you a pill that just came off the market to prevent an illness you don't know you have (yet?) that's different than just seatbelts and antilock breaks.

I was simply trying to suggest belt-and-braces (and possibly cycle clips) was the best approach. The more the merrier. Hey, I've had the vaccine why do I need to gel my hands?

 

[Secret Chief]

Herd immunity, not herd community

Er... yes...

 

[Secret Chief]

I re-read it. Freidan slip. But the idea is getting the vaccine to prevent the spread to others. So, the analogy only works if there is someone in the passenger seat. If it's just the driver of course seatbelts will help to lessen the severity of an accident but that's just regarding the driver. The mantra is its not about oneself but about others.

You can't prevent the passenger from getting into a car crash by wearing your seatbelt. The analogy doesn't work since masks are said to prevent others from getting sick from you-wearing seatbelts helps you not the person beside you.

I withdraw my analogy.
Get the vaccine, wear a mask, wash your hands, stay 2m apart. And this 18 months into it.