Viruses are smaller than bacteria. For example, at 45 nanometers (1 nanometer = 0.000001 millimeter), the hepatitis virus is approximately 40 times smaller than E.coli. By comparison, a human red ...

Seven kinds of virus collectively comprise an important cause of cancer, particularly in less developed countries and for people with damaged immune systems. Discovered over the past 54 years, most of ...

Though we often think of viruses as being harmful, only a small percentage of the millions of known species are pathogens. In fact, viruses are all around us, playing helpful and intricate roles in ...

Plant-infecting viruses cause significant losses to agriculture, including to staple crops such as wheat, maize, and rice. Preventing and managing endemic and emerging plant diseases is an ongoing ...

Now, in a new study looking at how these viruses were introduced and spread in North America, Louise H. Moncla from the ...

In early October 2014, 7 months after the 2014–2015 Ebola epidemic in West Africa began, a cluster of reported deaths in Koinadugu, a remote district of Sierra Leone, was the first evidence of Ebola ...

The World Health Organization and China released a long-awaited joint report into the origins of COVID-19 on Tuesday, pointing to transmission from bats to another animal and subsequently to humans as ...