Big Pharma — COVID vacines

Could mixing COVID vaccines boost immune response? Combining different coronavirus shots could speed immunization campaigns — and even boost immune response. Heidi Ledford A trial will test a two-shot vaccine regimen that uses two types of COVID vaccine.Credit: Ben Hasty/MediaNews Group/Reading Eagle/Getty Researchers in the United Kingdom have launched a study that will mix and match two COVID-19 vaccines in a bid to ease the daunting logistics of immunizing millions of people — and potentially boost immune responses in the process. Most coronavirus vaccines are given as two injections: an initial ‘prime’ dose followed by a ‘boost’ to stimulate the...