How can I protect myself from catching norovirus?

Question

Hello doctor,

My roommate had norovirus and was throwing up for two straight days. She is feeling a little better now, but still cannot eat much and has diarrhea. I have been taking care of her, but I am worried I might catch it too. I have been disinfecting everything, washing my hands constantly, and wearing gloves when I clean.

How long does the virus stay active on surfaces? And how can I tell if I am starting to get sick or if it is just stress? I also heard it can spread easily. Is there anything else I should be doing to protect myself and others?

Kindly help.

Answer 1

Hello,

Welcome to icliniq.com.

I read your query and can understand your concern.

Thank you for your responsible and thoughtful approach during your roommate’s illness. Norovirus is highly contagious and can spread easily through direct contact, contaminated surfaces, and even aerosolized particles from vomit. It is wise that you are taking precautions.

Norovirus can survive on hard surfaces for up to two weeks or longer, especially in cool and dry conditions. Routine household cleaners are often ineffective; use a bleach-based disinfectant (with at least 1000 to 5000 ppm chlorine) to sanitize commonly touched surfaces like doorknobs, toilet handles, light switches, and phones.

If infected, symptoms usually begin 12 to 48 hours after exposure and may include:

Sudden onset of nausea, vomiting, or diarrhea.
Abdominal cramps.
Fatigue and low-grade fever.
Headache or muscle aches.

It is common to confuse early stress or anxiety symptoms (like upset stomach or fatigue) with infection. If symptoms are mild and not worsening, stress may be the cause.

I suggest the following investigations be done; none initially if asymptomatic. If symptoms appear, stool PCR (polymerase chain reaction) for norovirus can confirm infection.

The most likely diagnosis is close contact exposure to norovirus with a risk of developing acute viral gastroenteritis. But other causes also include norovirus gastroenteritis, stress-induced gastrointestinal upset, and other viral gastroenteritis (for example, rotavirus, sapovirus).

Treatment plan includes the following -

Monitor for the onset of symptoms over the next two to three days.
Hydrate well and isolate if symptoms begin.
Use bleach-based surface disinfectants.
Continue handwashing and PPE (personal protective equipment) during caregiving.

I suggest the following precautionary measures:

Continue frequent handwashing with soap and water (alcohol-based hand sanitizers are less effective against norovirus).
Disinfect high-touch surfaces with bleach solution.
Use separate towels, utensils, and a separate bathroom.
Avoid preparing food for others for at least 48 hours after your last contact or symptoms, if infected.
Handle laundry and vomit or diarrhea cleanup carefully, using gloves and hot water washes.

No follow-up needed if asymptomatic. If symptoms develop, consult a physician for supportive care and monitor for dehydration. Notify the healthcare provider if severe vomiting, high fever, or prolonged symptoms occur.

I hope this helps.

Thank you and take care.

Regards.