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Some viruses can "hide" within a cell, which may mean that they evade the host cell defenses or immune system and may increase the long-term "success" of the virus. This hiding is deemed latency. During this time, the virus does not produce any progeny, it remains inactive until external stimuli—such as light or stress—prompts it to activate.
Viral evolution is a subfield of evolutionary biology and virology that is specifically concerned with the evolution of viruses. [1] [2] Viruses have short generation times, and many—in particular RNA viruses—have relatively high mutation rates (on the order of one point mutation or more per genome per round of replication).
Virus latency (or viral latency ... viruses that integrate into the host cell's genome can stay there as long as the cell lives. HIV ... This page was last edited on ...
The live virus cannot survive on surfaces for long, because “the virus needs a host to actually be effective,” Dahdal explains. ... the virus can last outside of the human body anywhere from ...
You are most contagious with COVID-19 when you are in the midst of peak infection (days three to five), when the virus is being excreted, Dr. Francesca Torriani, MD, an infectious disease ...
[16] [17] A meaning of 'agent that causes infectious disease' is first recorded in 1728, [15] long before the discovery of viruses by Dmitri Ivanovsky in 1892. The English plural is viruses (sometimes also vira), [18] whereas the Latin word is a mass noun, which has no classically attested plural (vīra is used in Neo-Latin [19]).
The 2024-2025 flu shot protects against three strains — H3N2, H1N1 and a flu B strain — but uptake has been very poor this season, Dr. David Warren, chief of the division of infectious disease ...
The so-called "hepatoencephalitis group of murine viruses" [20] were grouped into a single species named Mouse hepatitis virus, as approved in 1971. The species was merged with Rat coronavirus (discovered in 1970 [ 23 ] ) and Puffinosis coronavirus (discovered in 1982 [ 59 ] ) as Murine coronavirus in 2009.