An antibody discovered in the blood of a person who survived SARS could help others to fight COVID-19.The coronavirus that caused the 2003 SARS outbreak is a distant relative of SARS-CoV-2, the virus responsible for the current pandemic. The newfound antibody, dubbed S309, recognizes and blocks both viruses!!
Reference: https://www.nature.com/articles/s41586-020-2349-y