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Flu A can infect people and animals, while flu B is mostly a human virus. There are also 130 different subtype combinations of flu A, while flu B has just two lineages (B/Yamagata and B/Victoria ...
The sequences of the polymerase proteins (PA, PB1, and PB2) of the 1918 virus and subsequent human viruses differ by only 10 amino acids from the avian influenza viruses. Viruses with 7 of the 10 amino acids in the human influenza locations have already been identified in currently circulating H5N1 .
The Spanish flu infected around 500 million people, about one-third of the world's population. [2] Estimates as to how many infected people died vary greatly, but the flu is regardless considered to be one of the deadliest pandemics in history. [242] [243] An early estimate from 1927 put global mortality at 21.6 million. [4]
Influenza viruses have been found in many other animals, including cattle, horses, dogs, cats, and marine mammals. Nearly all influenza A viruses are apparently descended from ancestral viruses in birds. The exception are bat influenza-like viruses, which have an uncertain origin. These bat viruses have HA and NA subtypes H17, H18, N10, and N11.
“The flu virus, like all viruses, is not alive, so it can’t be killed,” says infectious disease expert Amesh A. Adalja, M.D., senior scholar at the Johns Hopkins Center for Health Security ...
For the Tasmanian tiger or thylacine, Lamm said the pace of progress has been quicker than expected. Colossal scientists have been able to make 300 genetic edits into a cell line of a fat-tailed ...
A 2011 study by the University of New South Wales using advanced computer modelling indicated that the thylacine had surprisingly feeble jaws; animals usually take prey close to their own body size, but an adult thylacine of around 30 kg (66 lb) was found to be incapable of handling prey much larger than 5 kg (11 lb), suggesting that the ...
This is a timeline of influenza, briefly describing major events such as outbreaks, epidemics, pandemics, discoveries and developments of vaccines.In addition to specific year/period-related events, there is the seasonal flu that kills between 250,000 and 500,000 people every year and has claimed between 340 million and 1 billion human lives throughout history.