In the three-and-a-half months since emergence of covid-19, six experimental vaccines have advanced into the human trial stage in what experts are calling the fastest such progress New Delhi: Extraordinary times require extraordinary responses.
The deadly health crisis caused by covid-19 has set off a frenetic race against time to develop a vaccine, with progress being made way faster than any previous effort.
While 83 companies across the globe are vying to develop a vaccine, six have already advanced to human trials or clinical evaluation stage, with 77 in pre-clinical evaluation phase as on 23 April, according to the World Health Organization (WHO) database.