People who recover from COVID-19 sometimes later test positive for SARS-CoV-2, suggesting their immune systems could not ward off a second attack by the coronavirus or that they have a lingering infection. A study now hints at a differentfalse
"...one small step for a man, one giant leap for mankind."
Belgian cytologist and biochemist Christian de Duve discovered lysosomes (the digestive organelles of the cell) and peroxisomes (organelles that are the site of metabolic processes involving hydrogen peroxide). In 1974, de Duve shared the Nobelfalse