re: So even if I get the vaccine I can still spread the China flu

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Wait, what?

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They believe you could potentially still catch COVID-19 but be asymptomatic (or have minimal symptoms) and spread it.

Not all vaccines create sterilizing immunity. Polio is a good example:

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Not all vaccines produce an immune response that is sterilizing, and neither do they need to to be effective at preventing disease. “Many vaccines are primarily intended to prevent disease and do not necessarily protect against infection,” according to the World Health Organization (WHO). In this case, disease means the response of the body to a pathogen. It’s the illness and all the symptoms of the disease.

For example, the inactivated poliovirus vaccine does not produce sterilizing immunity and is 90 percent or more effective. A vaccine can lessen the ability of a pathogen to produce a disease response without sterilizing it. If it does sterilize against a pathogen, it can prevent infection. For example, the human papillomavirus vaccine induces sterilizing immunity.

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LINK