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08-06-2021, 03:08 PM #1
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08-06-2021, 03:24 PM #6
https://journals.plos.org/plosbiolog...l.pbio.1002198
Imperfect Vaccination Can Enhance the Transmission of Highly Virulent Pathogens
Abstract
Could some vaccines drive the evolution of more virulent pathogens? Conventional wisdom is that natural selection will remove highly lethal pathogens if host death greatly reduces transmission. Vaccines that keep hosts alive but still allow transmission could thus allow very virulent strains to circulate in a population. Here we show experimentally that immunization of chickens against Marek's disease virus enhances the fitness of more virulent strains, making it possible for hyperpathogenic strains to transmit. Immunity elicited by direct vaccination or by maternal vaccination prolongs host survival but does not prevent infection, viral replication or transmission, thus extending the infectious periods of strains otherwise too lethal to persist. Our data show that anti-disease vaccines that do not prevent transmission can create conditions that promote the emergence of pathogen strains that cause more severe disease in unvaccinated hosts.▪█─────█▪ Equipment Crew #53 ▪█─────█▪
^^^^^^^ 6' 6" and Over Crew ^^^^^^^
------------- No Vax Crew ----------------
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08-06-2021, 03:25 PM #7
Its funny how all the libs think Joe is alt right/far right.
I am so far right I think Joe is far left in comparison to me. (and I understand it is in relation to my personal views)
But the libs can't understand the Joe is Left, just not as insanely left that they are
And the left is losing the few Left learning Libertarians to the right
Joe is a 1980s-1990s liberal**Black out tape over all laptop/cell phone cameras so gov cant spy on me fapping crew**
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08-06-2021, 03:26 PM #8
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08-06-2021, 03:33 PM #11
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08-06-2021, 03:36 PM #12
Go Joe, speak the truth even if it means your career... I can feel snowflake lefties brain explode as someone with a good reach has not swallowed the bull****... go **** yourselves you dumb ****s
Sloots gonna sloot
RIP ZYZZ, Greg Plitt
Say no to lefty snowflakes crew
Meat-eating crew, leaf eaters GTFO
Pureblood Crew
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08-06-2021, 03:57 PM #13
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08-07-2021, 07:56 AM #26
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