More than 1,000 Americans got ill from lettuce infected with a diarrhea parasite.
The outbreak spread across multiple states.
No cases appeared in Canada.
Health teams advise people to rinse all lettuce thoroughly and avoid raw salads unless the source is known.
COVID-19 has a secret route in the airways that makes swelling worse.
Doctors in the US removed a young patient’s infected tissue after severe Streptococcus A caused necrotizing fasciitis and pneumonia.
A lab-made bone graft is now being tested to help people with bone cancer while maintaining infections small.