90% efficacy for Pfizer’s COVID-19 mRNA vaccine is striking. But we need to wait for the full data
![](https://cdn.downtoearth.org.in/library/medium/2020-11-10/0.39528300_1605001246_pfizer.jpg)
Important questions remain: It’s unclear how long protection will last and if the vaccine protects against severe disease
Important questions remain: It’s unclear how long protection will last and if the vaccine protects against severe diseaseRead More