The BA.5 omicron subvariant, which is now the most prevalent coronavirus strain in the United States, is four times more resistant to COVID-19 vaccines, according to a new study by the Mayo clinic, but health officials say those shots remain your best defense against the virus. This week Dr. Greg talks again with Vaneet Arora, Associate Director - Clinical Microbiology in the UK College of Medicine, about the latest developments in the seemingly never ending battle against SARS-CoV-2.