COVID Vaccine Effectiveness

The cluster debates the effectiveness of COVID-19 vaccines, focusing on claims of 95% efficacy, waning protection against variants like Delta and Omicron, prevention of infection versus severe disease, and the need for boosters.

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Keywords

CI EDIT AZ usnews.com PFE medrxiv.org cidrap.umn HN facts.html reddit.com vaccine vaccines effectiveness effective vaccinated infection covid omicron delta 95

Sample Comments

toisanji Nov 17, 2021 View on HN

does that mean the vaccine is not really effective?

kyleblarson Dec 15, 2022 View on HN

"two weeks to flatten the curve", "if you get the vaccine you won't get covid", "the vaccine is 95% effective", "the vaccine is 80% effective", "the vaccine is 50% effective", "well you'll still get covid but you won't spread it to others", "well actually you can spread it to others"

creato Feb 23, 2019 View on HN

Vaccines aren't 100% effective. Google herd immunity.

dsjoerg Jan 4, 2021 View on HN

The evidence for the effectiveness of the vaccine is stronger than this: https://www.medrxiv.org/content/10.1101/2020.11.08.20222638v...

fullstackchris May 15, 2021 View on HN

what planet are you on? there have already been multiple studies that show the efficiacy of existing vaccines are not as effective against some of the variants. don't doubt that there will be bootsters for this

latchkey Jul 20, 2022 View on HN

It was never sold as "you'll be immune".ALL of the discussions have been that it reduces the effects, if you are infected.https://www.cdc.gov/coronavirus/2019-ncov/vaccines/effective...http

nostromo Feb 9, 2023 View on HN

Two things can be true…Vaccines are typically very effective. So effective they can eliminate a virus among vaccinated populations.Covid-19 vaccines are sorta effective. They didn’t eliminate virus transmission among vaccinated populations. But they reduced the severity of cases.Pretending the vaccines weren’t underwhelming in terms of efficacy doesn’t do us any favors, because people know from their own experience that most vaccinated people have had Covid.

_djo_ Jan 19, 2022 View on HN

Nope. You’re mixing numbers. Both the trials and independent national studies found vaccines like the Pfizer-BioNTech one to be about 95% effectiveness against severe disease and hospitalisation, not infection.It was never claimed that they’d completely prevent infection.New variants like Beta, Delta, and Omicron have varying levels of escape from both vaccination and prior infection, which means effectiveness at preventing severe disease or hospitalisation against those variants ha

vmception Aug 9, 2021 View on HN

The vaccines were never supposed to prevent infection 100%. Since the very beginning they've had varying degrees of effectiveness, this was widely reported every day since before the emergency authorizations in November 2020.They are functioning as advertised, as intended, as expected.Clear your cookies since the internet isn't even allowing you to see other information.

jjeaff Nov 9, 2021 View on HN

The current covid vaccines are some of the most efficacious vaccines we have ever had. Even with efficacy waning due to variants, they are still very effective.And no, not all vaccines prevent infection. It has long been well understood in immunology that some vaccines do not prevent infection but rather poor outcomes.The vaccine reduces level and length of infectivity by anywhere between 50% and 80% depending on which study and which variant.The anti COVID vaccine rhetoric is directly