Viruses come in two major flavors—not chocolate and vanilla, quips Harvard Medical School structural biologist Stephen Harrison, but those enveloped in membranes, such as herpesvirus, influenza virus, HIV and SARS-CoV-2, and those that are not, such as poliovirus, HPV, rotavirus and adenovirus.

Source: [Phys.org](https://phys.org/news/2026-09-molecular-movie-blanks-nonenveloped-viruses.html)

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