The drugmaker says its mRNA vaccine worked in 90% of patients in its trial, but some observers question how long immunity will last and who will benefit.
from WebMD Healthhttps://img.webmd.com/dtmcms/live/webmd/consumer_assets/site_images/article_thumbnails/news/2020/08_2020/coronavirus_vaccine/1800x1200_coronavirus_vaccine.jpg https://ift.tt/3pjPnsU
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