ScienceThe vaccine alternatives for people with compromised immune systemsScienceWhat we’ve learned about how our immune system fights COVID-19ScienceWhy cold weather makes it harder for the body to fight respiratory infectionsScience‘Super antigens’ tied to mysterious COVID-19 syndrome in childrenScienceWhy antibodies may not be the key to beating coronavirusScienceDozens of COVID-19 vaccines are in development. Here are the ones to follow.ScienceOxford vaccine enters final phase of COVID-19 trials. Here's what happens now.ScienceHere's what COVID-19 does to a child's bodyScienceWhy do asymptomatic COVID-19 cases even happen?ScienceHow quieting 'blood storms' could be key to treating severe COVID-19