Pfizer has made an incredible announcement: Its COVID-19 vaccine looks like it is 90% effective at preventing the disease inside its clinical trial. It’s a remarkable number: In the last 10 years, flu vaccine efficacy rates have wobbled between 19% and 60%. Outside scientists are now keen to see the full data in order to validate the findings. In the meantime, many are rejoicing at the prospect of a better tool for fighting COVID-19.
Image: Pfizer
