The reason it’s so contagious is because when you’re sick, “you can shed billions of norovirus particles that you can’t see without a microscope,” the agency explains. Getty “It only ...

Medics first discovered noroviruses in 1972 using an electron microscope ... to be put under quarantine in Wiesbaden after 67 tourists fell ill, or roughly every second guest. A norovirus outbreak ...

FILE - This electron microscope image provided by the Centers for Disease Control and Prevention shows a cluster of norovirus virions. (Charles D. Humphrey/CDC via AP, File)(Charles D. Humphrey ...

because “you can shed billions of norovirus particles that you can’t see without a microscope,” the CDC says. “It only takes a few norovirus particles to make you and other people sick.” ...

When a person is sick, they can shed billions of norovirus particles that can't be seen without a microscope. Maintaining proper hygiene, washing fruits and vegetables, cooking food thoroughly and ...