Vaccination does not prevent transmission

[jt512]

There's two parts to infection: source and target (so to speak).

If the source is infected then yes, they can (obviously) infect someone else. However if their virus load is low because they are vaccinated, the possibility of that transmission happening is lower.

If the target has a higher resistance to infection because they are vaccinated, the possibility of them getting infected is lower.

That's all nice in theory. But given a sufficiently infective pathogen such as the Omricron variant, what makes you think it makes any practical difference. Got any statistics on how much vaccination lowers transmission of Omicron?

To a first approximation, here's how effective vaccination was against Omicron transmission:

[imgw=600]http://jt512.dyndns.org/images/Omicron.png[/imgw]

 

[Chris_Halkides]

booster very helpful

Professor Topol wrote, "That level—about 50% effectiveness for the booster (vs Omicron)—would be associated with 10-fold more breakthrough infections than seen with a 95% effectiveness (Delta) So it’s no wonder there is the public perception that Omicron breakthroughs are omnipresent, that “vaccines aren’t working”. They aren’t working well, but it isn’t true that they’re not working to protect vs infections and transmission. It’s just much less. For context, remember that the FDA criteria for approving a Covid vaccine was set at a 50% reduction of symptomatic infections, so there’s unquestionably some efficacy here, just not nearly what we’ve been accustomed to seeing." Topol substack
The next paragraph is also worth reading; actually the whole article is. Let me quote one more sentence in summary: "There really is an Omicron booster vaccination dichotomy—protection vs infections vs protection vs severe disease (hospitalizations and deaths)—that has led to much confusion."

 

[Hercules56]

Another one to throw in the mix, as just posted in the main covid thread - vaccination appears to reduce the chances of long covid by around 99.72%.

I'll take that.

As will I.

 

[Hercules56]

What is your source for this? Every study I've seen shows that within a couple months, the current vaccines have little-to-no effectiveness against symptomatic Omicron infection. And if you have a symptomatic infection, you can transmit the disease.

No affect? They don't significantly reduce symptoms and chance of hospitalization?

 

[Norman Alexander]

No affect? They don't significantly reduce symptoms and chance of hospitalization?

Approx 6 to 10 fold reduction in serious outcomes.

COVID is extremely infectious and very harmful if not moderated by full vaccination. Then it becomes very infectious but only slightly harmful.

 

[Axxman300]

Do any vaccines prevent transmission of their target viruses?

When I get the flu-shot each year the idea is that should I be exposed to the virus it either does not effect me, or the symptoms are minor compared to being unvaccinated. I'm pretty sure, sick or no, I can pass the flu virus along to others.

The whole goal of vaccinations for COVID-19 is to prevent deaths, and hospitalizations. And the vaccine has proven itself in this department, the stats are clear. I work with the public all day, I still wear my mask.