If you're seeing this message, it means we're having trouble loading external resources on our website.

Hvis du er bak et webfilter, vær vennlig å sørge for at domenene .kastatic.org og .kastatic.org ikke er blokkert.

Hovedinnhold

Enhet 2: Virus

Om dette emnet

Viruses: Are they alive? Are they dead? Are they...undead? Learn more about these fascinating (and clinically important) particles that occupy a "gray area" between living and non-living things.

Biology is brought to you with support from the Amgen Foundation