Behind Pfizer's vaccine, an understated husband-and-wife 'dream team'

COVID-19 | Positive data on German drugmaker BioNTech and US partner Pfizer's Covid-19 vaccine is an unlikely success for the married couple behind the German biotech firm, who have devoted their lives to harnessing the immune system against cancer.

Pfizer said on Monday its experimental vaccine was more than 90 percent effective in preventing Covid-19, based on initial data from a large study...