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 ...

The unusual cases of pneumonia began to appear in midwinter, in China. The cause, researchers would later learn, was a coronavirus new to science. By March, the infection began to spread to other ...

Associate Professor of Biological Sciences, University of Maryland, Baltimore County Viruses have a bad reputation. They are responsible for the COVID-19 pandemic and a long list of maladies that have ...

Villain. Killer. Menace. Since 2020, scientists and public officials have used these words to describe SARS-CoV-2, the virus that causes COVID-19. News articles, research papers and tweets repeatedly ...

Besides serving as food for certain microbes, viruses perform some helpful functions that remain poorly understood. A ciliate, a type of single-celled microbe, swims next to Sphagnum moss, amplified ...

Penn Vet’s Louise Moncla has tracked H5N1 viruses to better understand the role wild birds play in the current HPAI outbreak ...

Scientists have uncovered over 200 new giant viruses lurking in ocean waters that not only help shape marine ecosystems but also manipulate photosynthesis in algae. These massive viruses once nearly ...

The timing and origin of Zika virus (ZIKV) introduction in Brazil has been the subject of controversy. Initially, it was assumed that the virus was introduced during the FIFA World Cup in June–July ...