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 “may escape antibody responses.

The spread of these subvariants has coincided with the lifting of mask mandates and the relaxing of many public health measures nationwide.

To 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.