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The norovirus refers to a family of around fifty viral strains that all lead to one uncomfortable result: copious periods spent in the bathroom. Every year, an estimated hundreds of millions persons globally contract the virus.

This virus is a form of infectious gastroenteritis, defined as “a swelling of the intestines and the large intestine that can cause diarrhea” as well as vomiting, notes a medical expert.

While it can spread in all seasons, it has earned the label “winter vomiting bug” because its cases peak from late fall to February across the northern parts of the world.

The following covers what you need to know.

In What Way Does Norovirus Propagate?

This pathogen is highly infectious. Most often, the virus invades the digestive system through microscopic germs originating in an infected person's saliva and/or stool. This matter may end up on surfaces, or in meals, then into the mouth – “what we call the fecal-oral route”.

The virus remain active for about two weeks upon objects such as doorknobs or bathroom fixtures, with only very little exposure for infection. “The required exposure of noroviruses is fewer than 20 viral particles.” In comparison, other viruses like Covid-19 typically need an exposure of one to four hundred virus particles to infect. “When a person, is suffering from norovirus infection, there’s billions of the virus for each gram of stool.”

There is also the possibility of transmission via particles in the air, notably if you’re in close proximity to an individual while they have active symptoms such as diarrhea and/or being sick.

Norovirus becomes infectious roughly 48 hours before the onset of symptoms, and individuals are often contagious for several days or even weeks after they’re feeling better.

Confined spaces like eldercare facilities, daycares and travel hubs create a “ideal breeding ground for acquiring infection”. Ocean liners have a notorious history: health authorities note dozens of norovirus outbreaks aboard vessels each year.

What Are Signs of Norovirus?

The onset of norovirus symptoms can feel rapid, initially involving stomach cramps, sweating, chills, nausea, throwing up and “severe diarrhea”. The majority of infections are “mild” in the medical sense, indicating they subside within 72 hours.

That said, it’s a remarkably miserable illness. “Individuals can feel quite wiped out; with a low-grade fever, headaches. In most cases, individuals are unable to perform regular routines.”

When is Medical Care Required for Norovirus?

Annually, norovirus causes several hundred deaths and many thousands hospital stays nationally, where people the elderly at greatest risk level. Those at greatest risk of experiencing serious infections include “young children under five years old, and particularly older individuals and people that are with weakened immune systems”.

Those in these vulnerable age categories are also especially susceptible to renal issues due to dehydration caused by excessive diarrhea. Should a person or a family member falls into a vulnerable group and unable to retain liquids, medical advice suggests consulting a physician or going to a local emergency department for intravenous hydration.

Most healthy adults and kids with no underlying conditions get over norovirus with no need for hospital care. While health agencies track several thousand of norovirus outbreaks annually, the actual figure of infections is closer to many millions – the majority go unreported since people are able to “deal with their infections on their own”.

While there’s no specific treatment you can do to shorten the duration of a bout with norovirus, it’s crucial to stay well-hydrated throughout. “Aim to drink an equivalent volume of fluids like electrolyte solutions or water as you are losing.” “Crushed ice, popsicles – essentially anything you can keep down that will maintain hydration.”

An antiemetic – medication that prevents nausea and vomiting – like certain over-the-counter options could be needed if you can’t retain fluids. Do not, however, take medications that stop diarrhea, like Imodium or Pepto-Bismol. “The body is trying to expel the infection, and should you trap it within … they stick around for longer periods of time.”

How Can You Avoid Catching Norovirus?

Currently, there is no an immunization. The reason is norovirus is “notoriously hard” to culture and research in laboratory settings. It has many strains, mutating often, rendering a single vaccine difficult.

That leaves fundamental hygiene.

Practice Thorough Handwashing:

“For preventing and controlling outbreaks, frequent hand washing is vital for all.” “Critically, sick people must not prepare meals, or look after other people while ill.”

Alcohol-based hand rub and similar sanitizers are not effective on norovirus, because of its structure. “You can use hand sanitizers in addition to handwashing, but hand sanitizer is not sufficient against norovirus and cannot serve as a replacement for washing with soap.”

Clean hands frequently well, using soap, for at least 20 seconds.

Steer Clear of an Infected Person's Bathroom:

If possible, designate a different restroom for any sick person in your household until they recover, and minimize close contact, as suggested.

Clean Affected Items:

Clean surfaces using a bleach solution (1 cup per gallon water) or undiluted three percent hydrogen peroxide, both of which {can kill|