‘The 1918 Spanish flu’s second wave was even more devastating’: Americans brace for another coronavirus outbreak in the fall

Immunizations against smallpox, measles or Hepatitis B should last a lifetime, but that has not been the case for previous coronaviruses.

Original source: http://www.marketwatch.com/news/story.asp?guid=%7BED2A502C-8432-11EA-9D9F-1F7ABF6144BC%7D&siteid=rss&rss=1

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