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… subtypes (strains). For this reason, you cannot have full immunity to the virus. And you may have many RSV infections … of RSV exist. For this reason, you cannot have full immunity to the virus and may have many RSV infections … are often exposed to infected people and have not built up immunity. There is no sure way to prevent respiratory …
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… or lengthy episodes of malaria as children will have some immunity to infection. However, this wears off a few years …