There are five viruses in the genus Betacoronavirus that are known to infect humans: OC43, HKU1, SARS-CoV, MERS-CoV, and SARS-CoV-2. The alphacoronaviruses 229E and NL63 and the betacoronaviruses OC43 and HKU1 cause the common cold. SARS-CoV, MERS-CoV, and SARS-CoV-2 are not the common cold.
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