A Covid-19 vaccine could be delivered as early as the end of the year, according to German company BioNTech and US pharmaceutical giant Pfizer. "Based on current projections we expect to produce globally up to 50 million vaccine doses in 2020 and up to 1.3 billion doses in 2021," the companies said in a press release last week. The two companies announced last week that their candidate vaccine was more than 90% effective in preventing infection in volunteers, per preliminary data. The vaccine uses a never-before-approved technology called messenger RNA, or mRNA, to produce an immune response in people who are vaccinated. The mRNA works by tricking cells into producing bits of protein that look like pieces of the virus.

Source: CNN November 16, 2020 11:42 UTC