In an effort to combat the COVID-19 Delta variant, Pfizer and BioNtech have announced the development of a booster vaccine and expect to launch clinical trials in August, according to a press release.1
Despite encouraging findings about the efficacy of currently available vaccines,2 the companies are developing a booster shot specifically designed for the Delta variant
上个月的新闻
https://fortune.com/2021/08/09/covid-vaccines-delta-variant-vaccine-biontech-pfizer/
Pfizer partner BioNTech aims to begin tests this month to determine if an altered form of its COVID-19 vaccine can better protect against the far more contagious Delta variant.
The clinical trial, whose results are anticipated in the fourth quarter, will also examine whether a combination of jabs that includes an inoculation against Delta and the original “wild type” first discovered in Wuhan proves effective.