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"There are currently 7 types of human coronaviruses (HCoV) that can cause human respiratory diseases: HCoV-229E, HCoV-OC43, SARS-CoV, HCoV-NL63, HcoV-HKU1, MERS-CoV ."
<https://www.hipro.us/products/sars-cov-2-neutralizing-antibody-test-kit-colloidal-gold.html>