World Health Organization is tracking Mu, a strain of SARS-CoV-2
- First detected in Colombia at the start of the year
- Mu has been reported in sporadic outbreaks in parts of South America and Europe
- scientists are studying whether it could have properties that would help it get past immune protections built up by vaccination or past infection
- WHO has listed it as one of five variants of interest
So far it has not spread widely. So far.