But, overall if we can get these vaccines into people arm’s ASAP, we can stop the spread. In South Africa, there is another variant called B.1.351 emerged from B.1.1.7. “If we stop the replication of the virus, we can stop the mutants from forming the new strains. As COVID-19 evolves, there are some concerns about vaccine efficacy and companies are researching the variants. Lall says there need to be more resources for older people when it comes to registering for the vaccine.