LONDON, United Kingdom (AFP) — Oxford University announced on Thursday it will launch a medical trial alternating doses of Covid-19 vaccines created by different manufacturers, the first study of its kind. The trial will show whether different Covid doses — those created by the Astrazeneca and Pfizer/BioNTech pharmaceutical companies — can be used interchangeably to allow greater flexibility in pressured vaccine delivery schedules. The British government’s Deputy Chief Medical Officer, Jonathan Van-Tam, said the […]