Understanding whether people build immunity could help reopen economies around the world.
pandemic seems extraordinary. But even with over 1.6 million people infected worldwide it's unclear whether recovery will make patients immune going forward.
"COVID-19 has emerged so recently, we know very little about whether or not an initial infection 'teaches' the immune system how to protect against a future infection," explained Mary Carol Jennings, a physician and vaccine scientist for the International Vaccine Access Center at the Johns Hopkins Bloomberg School of Public Health.
The study raised concerns in the scientific community that a lack of antibody production observed in these patients in China could mean a lack of immunity.
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