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An increase in cases of diseases caused by group A Streptococcus has been seen in several countries including Canada. (National Institute of Allergy and Infectious Diseases (NIAID))

Strep A explainer: Why invasive cases are increasing, how it spreads and what symptoms to look for

An increase in serious illnesses caused by group A Streptococcus has recently made Strep A a growing concern in Canada and elsewhere. Here’s why and how it’s spreading, and what symptoms to look for.
Cells secrete exosomes carrying molecules that play a critical role in both health and disease. Meletios Verras/iStock via Getty Images Plus

Chickenpox and shingles virus lying dormant in your neurons can reactivate and increase your risk of stroke – new research identified a potential culprit

People with an active case of shingles have up to an 80% higher risk of stroke than those without. The increased risk is highest for patients under 40.
Preliminary research suggests that the omicron variant may potentially induce a robust immune response. Olga Siletskaya/Moment via Getty Images

Is the omicron variant Mother Nature’s way of vaccinating the masses and curbing the pandemic?

Some of the omicron variant’s unique properties – such as its ability to spread rapidly while causing milder COVID-19 infections – could usher in a new phase of the pandemic.
The Monkeypox virus was isolated most recently in 2012 from a dead infant mangabey (species of monkey) in Ivory Coast. Shutterstock

Monkeypox has resurfaced in Nigeria. What you need to know

A disease suspected to be monkeypox is on the rampage in Nigeria. In less than one month, it has spread to seven of the country’s 36 states and infected 31 people.
Children in particular experience a multitude of viral illnesses during their early years. MIKI Yoshihito/Flickr

Health Check: when are we most likely to catch viral diseases?

Viruses cause all kinds of infections from relatively mild cases of the flu to deadly outbreaks of Ebola. Clearly, not all viruses are equal and one of these differences is when you can infect others.

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