Cytokines help the immune system kill pathogens, but too many cytokines can lead to bad health outcomes and may turn into a "cytokine storm."
Two large recent studies show that people hospitalized for COVID-19 in March were more than three times as likely to die as people hospitalized for COVID–19 in August.
Levels of the stress hormone cortisol in earwax could be a new way to track anxiety, depression and other medical conditions.
The researchers say this is the longest anyone has been reported to be contagious with COVID-19 while remaining asymptomatic.
The virus has mutated in mink — as might be expected — but we don't know if those mutations changed the virus significantly.
In the absence of a COVID-19 cure or vaccine, scientists are investigating whether vitamin D can reduce the risk of COVID-19 infection.
Across the world, immunologists who retooled their labs to join the fight against SARS-CoV-2 are furiously trying to explain why some people get so sick while others recover unscathed.
A famous equation used in the search for alien life has inspired a new model that estimates the risk of COVID-19 transmission.
The Centers for Disease Control and Prevention has new guidance clarifying what exactly “close contact” means when it comes to transmission of SARS-Cov-2, the virus that causes COVID-19.
Scientists have found a second doorway, called neuropilin-1, that the novel coronavirus uses to invade human cells.
But even if vaccines are approved soon, several major roadblocks could significantly delay the timeline of distribution.