Vaccine Efficacy Dropping
Now there is a study done in the US that confirms the Israeli study: The vaccine's ability to fend off the virus (efficacy) diminishes quickly.
Quote:
All vaccines can protect against severe COVID-19 infections and death, even in the face of the Delta variant, but the data on the vaccines' efficacy has been mixed.
The study used PCR testing data from the Mayo Clinic Health System's sites in Minnesota, Wisconsin, Arizona, Florida, and Iowa, to look for breakthrough coronavirus cases among 35,902 people fully vaccinated with Moderna and 37,573 people fully vaccinated with Pfizer. Some 40% of the people in the study were also over 65 years old.
Over the course of the study in Minnesota, Moderna's vaccine was found to be 86% effective against a COVID-19 infection while Pfizer's was 76% effective. Both were also highly effective against hospitalization (Moderna 91.6%, Pfizer 85%), ICU admission (Moderna 93.3%, Pfizer 87%), and death from COVID-19 (no cases found).
But what has caused concern is the data from July, when the Delta variant became the dominant strain in the US and accounted for more than 70% of cases in Minnesota.
During that month in Minnesota, Pfizer's effectiveness against COVID-19 infection dropped to 42%, while Moderna's dropped less dramatically to 76%.
Also: the article confirms that Pfizer is working on Covid Vaccine version 2.0...means we're back to standing in line this winter to update our vaccine passport or be faced with sanctions. :)
Quote:
Pfizer told Axios in a statement that it expected "to be able to develop and produce a tailor-made vaccine against" the Delta variant "in approximately 100 days after a decision to do so, subject to regulatory approval."
read more...https://ca.news.yahoo.com/pfizers-va...105945416.html