Dave
TS Founding Member
You have made the cardinal sin that everyone seems to make on this subject. It's not just about whether you've been vaccinated or not. What about all the people abroad who haven't yet been that you could be potentially mixing with?
The Vaccine does not stop you getting Covid and therefore spreading it. In fact my understanding of it is that your chances of getting it are the exact same with or without the jab. The major difference comes in the fact you're clearly far more unlikely to be hospitalised after having the jab. That's why it is so important we all get one.
So to answer you it's not about keeping us all locked up. It's about keeping this thing under more control so we don't have to continue to live our lives like this.
You are actually making the same cardinal sin, making assumptions regarding the transmission risk of vaccinated people.
The actual answer is, we are not certain but the data suggests vaccination is reducing transmission, but not likely to zero.
The issue actually boils down to viral load, If the immune system gets an early go at shutting down viral replication it may not stop “infection” (which is simply defined as a pathogen being able to reach some reasonable level of replication), but it probably reduces viral load. Viral load is actually critical when it comes to transmission as the body has a whole host of indiscriminate protections against infection and if only a small proportion of viral particles enter the body these will likely prevent replication themselves. The more viral particles involved in initial contact the more likely replication takes hold. This is why health care professionals have a higher risk of severe disease than most, they do procedures that increase viral shedding (intubating a patient for example).
This is seen in many virus’s, for example a HIV positive person on medication can’t transmit the HIV virus, they still have it in their body and it’s replicating but it’s to such a low level that the viral load they have in their bodily fluids isn’t high enough to transmit to another person.
Vaccination rarely causes sterile immunity (because the long term response to vaccination is rarely antibody related and more often t-cell related), but it can have a massive impact on the ability for a virus to spread. Effectively you get the immune system to bring the R rate down instead of physical barriers (potentially, we need to see the data develop).