More than 1,000 Americans got unwell from lettuce infected with a diarrhea parasite.
The outbreak spread across several states.
No cases emerged in Canada.
Health teams advise people to rinse the lettuce well and skip raw salads unless the source is known.
COVID-19 has a hidden route in the lungs that makes swelling worse.
Doctors in the US excised a young patient’s infected tissue after virulent Streptococcus A caused necrotizing fasciitis and pneumonia.
A engineered bone graft is now being tested to help people with bone cancer while reducing infections small.