COVID's latest subvariants: What you need to know
b"The Omicron subvariants BA.4 and BA.5 are spreading quickly. They already make up a majority of new COVID infections in the U.S., and it appears they are much better at getting around immunity. Research from Harvard Medical School shows the BA.5 subvariant \\u201cmay escape antibody responses.\\n\\nThe spread of these subvariants has coincided with the lifting of mask mandates and the relaxing of many public health measures nationwide.\\n\\nTo provide you with details about the latest COVID-19 variants and the state of the pandemic here in Canada heading into the summer, we are joined once again by Dr. Zain Chagla, an infectious diseases physician at St. Joseph's Healthcare in Hamilton."