Jonm
Established Member
I have been looking at the recent reports of vaccines reducing the transmission of coronavirus. No distinction is made between types of vaccine. Here are some links
Covid: One dose of vaccine halves transmission - study
One dose of COVID-19 vaccine can cut household transmission by up to half
expert reaction to preprint looking at COVID-19 vaccination and household transmission | Science Media Centre
Public Health England have investigated the effect of the vaccine on
transmission of coronavirus within households
They found that the vaccine reduced onward transmission by between 38% and 49%.
This protection is on top of the reduced risk of a vaccinated person developing symptomatic infection in the first place, which is around 60 to 65% – 4 weeks after one dose of either vaccine.
So putting that together, one dose of the vaccine reduces catching Covid and showing symptoms, by 62% and reduces passing it on to an unvaccinated household member by a further 43%. So the vaccine reduces onward transmission to an unvaccinated household member by nearly 80% overall (that is my conclusion).
It is good news that the vaccine actually reduces onward transmission in the home setting and hopefully It will do even better after two doses and possibly even better again in the non home setting. It seems to be a thorough unbiased analysis.
I am not sure where it leaves us with asymptomatic disease and I have some concerns about it possibly being elderly vaccinated people with younger unvaccinated people, not being as physically close as say an unvaccinated couple.
Perhaps I am being too critical or cautious but this disease has wrong footed us a number of times.
Covid: One dose of vaccine halves transmission - study
One dose of COVID-19 vaccine can cut household transmission by up to half
expert reaction to preprint looking at COVID-19 vaccination and household transmission | Science Media Centre
Public Health England have investigated the effect of the vaccine on
transmission of coronavirus within households
- They have looked at 24000 cases of vaccinated people with laboratory confirmed symptoms of coronavirus, and how it spread to their household members who had not been vaccinated.
- They then compared this with unvaccinated people with laboratory confirmed symptoms of coronavirus, and how it spread to their household members who had not been vaccinated
They found that the vaccine reduced onward transmission by between 38% and 49%.
This protection is on top of the reduced risk of a vaccinated person developing symptomatic infection in the first place, which is around 60 to 65% – 4 weeks after one dose of either vaccine.
So putting that together, one dose of the vaccine reduces catching Covid and showing symptoms, by 62% and reduces passing it on to an unvaccinated household member by a further 43%. So the vaccine reduces onward transmission to an unvaccinated household member by nearly 80% overall (that is my conclusion).
It is good news that the vaccine actually reduces onward transmission in the home setting and hopefully It will do even better after two doses and possibly even better again in the non home setting. It seems to be a thorough unbiased analysis.
I am not sure where it leaves us with asymptomatic disease and I have some concerns about it possibly being elderly vaccinated people with younger unvaccinated people, not being as physically close as say an unvaccinated couple.
Perhaps I am being too critical or cautious but this disease has wrong footed us a number of times.