New data released Thursday by the Centers for Disease Control and Prevention suggest that the most recent Covid-19 booster offers about 54% percent protection against infection with the virus.
A study published in the CDC’s online journal Morbidity and Mortality Weekly Report showed that the updated vaccine was essentially equally effective at protecting against the strain targeted by the vaccine — called XBB.1.5 — and the JN.1 subvariant, which emerged after the vaccine was made. JN.1 is currently the dominant virus circulating in the United States.
Ruth Link-Gelles, an author of the study, said it shows that the latest Covid shot offers significant protection to recipients.
“We know that Covid is continuing to cause thousands of hospitalizations and hundreds of deaths in this country each week,” Link-Gelles, the vaccine effectiveness program lead in the CDC’s National Center for Immunization and Respiratory Diseases, told STAT. “And 50% added protection against Covid-19 is really going to be a meaningful increase in protection, especially for those at highest risk.”
Arnold Monto, a veteran vaccine effectiveness researcher at the University of Michigan, said the findings are what are expected at this point for Covid vaccine boosters.
Is that good? Because it doesn’t sound good.
54% effectiveness against infection sounds pretty good to me.
Ohh. So 54% effective against getting infected in the first place? That sounds pretty good indeed.
But does is stack with mage armour?
I don’t know if it’s because this variant has milder symptoms or because I was boosted in October, but I got COVID in November and felt almost nothing besides mild irritating cold-like symptoms. I do suspect that the booster helped though because a friend who hasn’t yet gotten a booster got sick around the same time and felt a lot worse.
I’ve been reading about the different vaccines available today, and I found different numbers from October. https://www.yalemedicine.org/news/covid-19-vaccine-comparison
Though it looks like the JN.1 variant is new since September, and that’s likely what drives the new data down. It had 3.5% of new cases in November, 21% in December and 85% in January. (Edit Source: https://www.yalemedicine.org/news/jn1-coronavirus-variant-covid)
Outbreak.info is another great site for tracking covid variants. The company I work for makes covid detection PCR kits and we use this site to guide our products.
FYI, this is about the same effectiveness as the annual flu vaccine has.
