The highly-infectious Delta coronavirus variant has spread to at least 174 countries worldwide, from the US to Australia, causing a surge in COVID-19 cases. The variant has mutations that help it partially escape the immune response produced by vaccines.

The data for how well COVID-19 vaccines work against the Delta variant isn’t clear cut.

The vaccines may offer less protection against symptomatic illness caused by Delta compared to other variants.

Public Health England said in a report published on September 9 that, generally, COVID-19 vaccines were 79% effective against COVID-19 with symptoms caused by Delta after two doses.

Here’s how much protection COVID-19 vaccines give you against symptomatic Delta infections, based on the best available data from four studies.

Read the article below…

Read the Article


Are the COVID Vaccines Unusually Ineffective?

Are the COVID vaccines substantially different from/inferior to other vaccines in terms of their effectiveness? The issue raised, and I'm mostly paraphrasing here, is this: Most vaccines (e.g. measles, smallpox) have efficacy defined such [...]

COVID Vaccines Compared

There are three COVID-19 vaccines approved for use in the U.S. The Pfizer, Moderna, and Johnson & Johnson vaccines are all highly effective in protecting you from the virus that causes COVID-19. The Pfizer [...]