"Pandemics results from the emergence of an influenza A virus that is novel for the human population. Evidence for recycling of subtypes of influenza A after intervals of 60 years or more has been derived by determining antibody prevalence in elderly populations prior to the emergence of subtypes of H2N2 in 1957 and H3N2 in 1968. A more ominous threat is the reservoir of 14 influenza A subtypes that persist in avian hosts. An avian virus can reassert with a human virus, as occurred in 1957 and 1968, to allow the creation of progeny that possess novel surface antigens with the potential to spread in human populations. Both pandemic viruses, A(H2N2) of 1957 and A(H3N2) of 1968, had evidence of gene reassortment with avian viruses. Swine are considered the most likely “mixing vessel” for this event, but viruses with avian genetic characteristics have also been recovered from horses and aquatic mammals."
Quote Details
Added by wikiquote-import-bot
Unverified quote
0 likes
Original Language: English
Available Languages (1)
Sources
p.64
https://en.wikiquote.org/wiki/Influenza
Revision History
No revisions have been submitted for this quote.
Categories
Influenza
41 quotes on TrueQuotesView all quotes by Influenza →
Related Quotes
"As we now know, wild birds are the natural reservoir for influenza A viruses. With extensive antigenic and genetic di…"
"Many international health agencies and research laboratories collaborate to track influenza virus evolution, evaluate…"
"We are no doubt more prepared in 2018 for an infectious disease threat than in 1918. But it is critical to remember t…"
"The survival data for TGEV and MHV suggest that enveloped viruses can remain infectious on surfaces long enough for p…"
"The small British Crown dependency of Tristan da Cunha is one of the most isolated points on the planet. Over 1700 mi…"
"Influenza pandemics are events that have occurred in the past and will undoubtedly occur in the future. There is unce…"
"Waterbirds, to an influenza researcher, are more than majestic swans and charming mallards. They are instead stealthy…"
"The use of licensed inactivated trivalent influenza vaccine is increasing, but even if all high risk persons currentl…"
"Planning and preparedness efforts are widespread and ongoing, on a scale likely not imagined in 1918. Pandemic plans …"
"Sambucus nigra L. products - Sambucol - are based on a standardized black elderberry extract. They are natural remedi…"