Page 73 - كتاب مبادرة ابنك والمستقبل 2021

VIRUSES

References
1. ^ Wu, Katherine J. (15 April 2020). "There are more
viruses than stars in the universe. Why do only some infect
us? – More than a quadrillion quadrillion individual viruses
exist on Earth, but most are not poised to hop into humans.
Can we find the ones that are?". National Geographic Society.
Retrieved 18 May 2020.
2. ^ Jump up to:a b c Koonin EV, Senkevich TG, Dolja
VV (September 2006). "The ancient Virus World and evolution
of cells". Biology Direct. 1 (1): 29. doi:10.1186/1745-6150-1-
29. PMC 1594570. PMID 16984643.
3. ^ Jump up to:a b c Dimmock p. 4
4. ^ Jump up to:a b "Virus Taxonomy: 2019 Release".
talk.ictvonline.org. International Committee on Taxonomy of
Viruses. Retrieved 25 April 2020.