What we know about BA.4 and BA.5 — the latest subvariants to cause COVID surge

If one thing is clear about COVID-19, it’s that keeping track of its various permutations is a never-ending challenge

As with previous versions of the virus, the concern is that while widespread transmission will produce relatively mild disease in most people, the absolute number of people who need be hospitalized or who die will necessarily grow.

Evidence from South Africa suggests BA.4 and BA.5 are not causing a worrying surge in hospitalizations, but in Portugal the rise in hospitalization and death is similar to previous Omicron surges.Public health officials in Canada have not called for a return to any kind of forced restriction in our daily lives, or of vaccine and mask mandates.Health officials are unanimous about the first and best way to fight BA.4 and BA.5 — get booster shots of vaccine.

Public health doctors also recommend that people wear masks while indoors among large groups of people, and favour outdoor gatherings if possible.

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