The race for a Covid-19 vaccine: 5 things you need to know
Soon after China released the gene sequence for SARS-CoV-2 in January, institutions and companies sprang into action
There are at the moment more than 40 vaccine trials aimed at preventing Covid-19. Even so, the most optimistic projections are that the earliest a vaccine will be ready is by Easter 2021.
It’s a critical race, since every epidemiological model shows that the virus won’t fully subside until there is a mass vaccination programme to halt infections. But making a vaccine is a field of science in which failure is almost guaranteed: more trials will crash and burn than succeed...