https://www.khanacademy.org/science/biology/biology-of-viruses/virus-biology/a/intro-to-viruses 2023-09-14T11:22:40.102153098Z Intro to viruses What a virus is. The structure of a virus and how it infects a cell. article https://www.khanacademy.org/science/grade-11-biology-snc-aligned/x58c107ba92d3f0b2:domain-p-acellular-life/x58c107ba92d3f0b2:introduction-and-historical-background/a/are-viruses-dead-or-alive 2021-05-25T21:59:59Z Are viruses dead or alive? article https://www.khanacademy.org/science/revision-term-1-tg-botany-class-12/x4896182c249a2390:week-3/x4896182c249a2390:viruses/v/what-is-a-virus 2024-06-28T21:04:33.970147436Z What is a virus? Viruses infect every living thing and may be as old as life itself. Everywhere there’s life on Earth, from high up in the atmosphere to deep in the ocean, there are viruses. The vast majority aren’t harmful to humans at all, but to understand the few that are—like the SARS CoV-2 virus behind the COVID-19 pandemic—we must learn about the connections between humans, viruses, other organisms, and the ecosystems we co-habit. American Museum of Natural History video https://cdn.kastatic.org/ka_thumbnails_cache/56e5827a-35c6-44f2-9a04-7fb1169001ae_1280_720_base.png What is a virus? Viruses infect every living thing and may be as old as life itself. Everywhere there’s life on Earth, from high up in the atmosphere to deep in the ocean, there are viruses. The vast majority aren’t harmful to humans at all, but to understand the few that are—like the SARS CoV-2 virus behind the COVID-19 pandemic—we must learn about the connections between humans, viruses, other organisms, and the ecosystems we co-habit. https://cdn.kastatic.org/ka-youtube-converted/XhgmUOIpGx4.mp4/XhgmUOIpGx4.mp4 248 Introduction and historical background