COVID-19 pandemic, a number of coronavirus vaccines were developed in record time last year.Now, new more transmissible variants that have emerged in different parts of the world have raised concerns about the protection they can offer — and vaccine makers are looking at updating their jabs.
How prevalent are variants? A closer look at what — and where — they are in Canada “I think it’s clearly starting to look that … we’re going to have to, at some point, change the vaccines that we use to address the variants,” said Dr.