Polio Vaccination Causes More Infections than Wild Virus
Polio Vaccination Causes More Infections than Wild Virus
In rare instances, the live virus in oral polio vaccines can mutate and become infectious, causing new outbreaks.
Polio Vaccination Causes More Infections than Wild Virus
Polio Vaccination Causes More Infections than Wild Virus

In rare instances, the live virus in oral polio vaccines can mutate and become infectious, causing new outbreaks.

In rare instances, the live virus in oral polio vaccines can mutate and become infectious, causing new outbreaks.

virus evolution
HIV-1 Genome Extracted from 1966 Tissue Sample
HIV-1 Genome Extracted from 1966 Tissue Sample
Nicoletta Lanese | Aug 19, 2019
Scientists spent five years reconstructing what is now the oldest HIV-1 genome yet recovered.
Image of the Day: Ringspots
Image of the Day: Ringspots
Carolyn Wilke | Jan 25, 2019
Tiny insects carry the tomato spotted wilt virus, which causes infected plants to develop discolored ring-shape blotches.
Ancient Humans Had Hepatitis B
Ancient Humans Had Hepatitis B
Abby Olena | May 9, 2018
Analyses of more than 300 ancient human genomes show that Hepatitis B virus has infected humans for at least 4,500 years and has much older origins than modern viral genomes would suggest.
Pathway to Polio Virulence Revealed
Pathway to Polio Virulence Revealed
Ashley P. Taylor | Mar 23, 2017
Using epidemiological and laboratory data, scientists have mapped out a sequence of mutations through which the attenuated oral polio vaccine reverts to a virulent virus.
Evolution of H7N9
Evolution of H7N9
Erin Weeks | Sep 20, 2013
Genetic diversity helped avian influenza A viruses make the leap from birds to humans, researchers report.
Catching the Cold
Catching the Cold
Fred Adler | Jan 31, 2013
Tracking the genetic diversity and evolution of rhinoviruses can lead to a better understanding of viral evolution, the common cold, and more dangerous infections.
Special Review for H5N1 Grants?
Special Review for H5N1 Grants?
Jef Akst | Dec 4, 2012
The National Institutes of Health reveals a controversial plan to regulate the funding of H5N1 research.
The Plastic Genome
The Plastic Genome
Beth Marie Mole | Nov 30, 2012
The poxvirus stockpiles genes when it needs to adapt.
RNA-DNA Virus Hybrid Found
Sabrina Richards | Apr 20, 2012
Researchers discovered a virus produced from recombination between RNA and DNA viruses, suggesting a possible new mechanism of virus evolution.