Opinion | What if we already have a coronavirus vaccine?

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After receiving a vaccine against, say, polio, a person’s body creates an army of polio-specific antibodies that recognize and attack the virus before it has a chance to settle. However, antibodies against polio cannot fight infections caused by other pathogens. Thus, based on this framework, polio vaccines should not be able to reduce the risk associated with other viruses, such as the coronavirus.

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