What is the difference between virus and worms?

Question

how they work

Answer 1

worms are bigger than virus.

Answer 2

Computer worms are similar to viruses in that they replicate functional copies of themselves and can cause the same type of damage. In contrast to viruses, which require the spreading of an infected host file, worms are standalone software and do not require a host program or human help to propagate.

link -> https://www.cisco.com/c/en/us/about/security-center/virus-differences.html