Supplies aside, other Covid-19 vaccines under development may work differently in different populations and “we likely will benefit from having a menu of vaccine options,” Cutrell said. Instead, the vaccines are made with a brand-new technology that injects a piece of genetic code for the spike protein. Once again, the body produces some spike protein and primes the immune system. PROTEIN VACCINESNovavax makes its vaccine candidate by growing harmless copies of the coronavirus spike protein in the laboratory and packaging them into virus-sized nanoparticles. But inactivated vaccines give the body a sneak peek at the germ itself rather than just that single spike protein.

Source: Hindustan Times November 17, 2020 18:23 UTC