More than 1,000 Americans got ill from lettuce infected with a diarrhea parasite.
The outbreak spread across multiple several states.
No cases emerged in Canada.
Health teams advise people to clean all lettuce well and skip raw salads unless the source is known.
COVID-19 has a little-known route in the respiratory system that makes swelling more severe.
Doctors in the US excised 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 low.