A new mpox variant has been detected in Toronto. Here is what you need to know

An undated photo of the Imvamune vaccine, which prevents mpox.

Toronto Public Health (TPH) has confirmed two travel-related cases of a fast-spreading variant of the mpox virus.

These are the first cases of the mpox clade Ib strain to be identified in Toronto and Ontario.

This novel variant has been associated with outbreaks in parts of Central and Eastern Africa and has been identified in a small number of travel-related cases internationally, including in several European countries, the health unit said in a news release.

Since 2022, mpox in Toronto has only involved the clade IIb strain of the virus.

According to the Public Health Agency of Canada, this new variant is “less severe” than another strain of the virus known as clade Ia.

While cases have been reported across Toronto, TPH has recorded higher numbers of mpox among residents of the downtown core.

Last year, there were 155 confirmed cases of the virus in the city.

What is mpox?

Mpox is a virus that spreads through person-to-person contact with infected lesions, skin blisters, body fluids, or respiratory secretions.

It can also be transmitted by contact with materials contaminated with the virus, like clothing or bedding, and through bites or scratches from infected animals.

At this time, the virus has spread mostly through close, intimate, or sexual contact with a person who has it. Gay, bisexual, and other men who have sex with men are most affected, says TPH.

Both variations of the mpox virus have similar symptoms, including painful skin lesions, fever, and other flu-like symptoms. They can also both be prevented and treated in the same way, with vaccination being the best option, says TPH.

Vaccination best way to prevent mpox transmission: TPH

Toronto Public Health continues to offer eligible residents the Imvamune vaccine through its clinics and community partners. Vaccination is free and available without an OHIP card.

Two doses are recommended for optimal protection against both strains of mpox.

Those who have previously received one dose are partially protected but are encouraged to receive a second one 28 days after the first dose. Those who have already received two doses do not need additional ones. Appointments can be booked online or at a local 2SLGBTQ+ health-care service provider.

People who have already received a smallpox vaccine are being encouraged to still get vaccinated for mpox, as they may not be protected.

A post-exposure treatment is also available for those who believe they have been exposed to the mpox virus.