More than 1,000 Americans got unwell from lettuce infected with a diarrhea parasite.
The outbreak spread through several states.
No cases appeared in Canada.
Health teams call on people to rinse all lettuce thoroughly and avoid raw salads unless the source is known.
COVID-19 has a little-known route in the respiratory system that leads to swelling worse.
Doctors in the US removed a young patient’s infected tissue after aggressive Streptococcus A caused necrotizing fasciitis and pneumonia.
A synthetic bone graft is now being tested to help people with bone cancer while reducing infections small.