(Kimberly Drake/ Medical News Today) — According to the Centers for Disease Control and Prevention (CDC), there have been more than 9 million confirmed COVID-19 cases in the United States since January 2020.
With that number increasing every day, scientists remain focused on uncovering how the immune system responds to SARS-CoV-2, which is the virus that causes COVID-19, to combat it successfully.
Researchers have been investigating key questions surrounding immunity to SARS-CoV-2 since it first appeared, including how long protection from the virus lasts after recovery and whether or not the severity of the symptoms affects that immunity timeframe.
Uncovering these factors may influence the way in which scientists develop effective treatments and vaccines. It may also indicate whether or not herd immunity is possible. (…)