7 things you need to know about these viruses
Unlike bacteria or other microorganisms, viruses are remarkably simple structures — little more than a strand of genetic material wrapped in a protective protein shell called a capsid. They occupy a strange middle ground between the living and non-living: too simple to reproduce on their own, yet sophisticated enough to hijack the machinery of a living cell and turn it into a virus-making factory.
These tiny structures can wreak havoc on our bodies — rendering us immobile for days and, in extreme cases, proving fatal. And while viruses spread in a variety of ways, there's a common thread running through some of the most dangerous ones: contact with infected bodily fluids. That's true of Hantavirus, Ebola, and Norovirus — three very different viruses that share this critical transmission risk, and three that continue to make headlines for good reason.
1. Lifespan of a virus
Their very dependence on a host is what makes viruses such effective — and frustrating — agents of disease. Much like parasites, they can survive outside a host for a period of time, but their capsid eventually breaks down, rendering them harmless. Once inside a host, however, even a tiny number can cause illness — some viruses need as few as ten particles to trigger an infection.
To put their scale in perspective, viruses are 100 to 1,000 times smaller than a typical human cell. Yet despite their microscopic size, their impact is anything but small.
2. How they spread
So how does a virus actually get into your body? It needs an entry point — the mouth, nose, eyes, a cut in the skin, or through sexual contact. From there, it's a race to latch onto your cells before your immune system can shut things down.
Most infections happen through a surprisingly short list of routes: breathing in air exhaled by an infected person, touching a contaminated surface and then touching your face, eating or drinking something that's been exposed to the virus, getting bitten by an insect carrying it, or coming into direct contact with an infected person's bodily fluids.
See our blog on Bodily Fluids and Biohazard Risk
3. How easily can you contract a virus?
Here's what makes some viruses so unnerving: a tiny amount of exposure is all it takes. Norovirus — the culprit behind those legendary cruise ship outbreaks — can cause a full-blown infection with as few as 18 viral particles. Others are far less efficient and require prolonged or intimate contact to spread at all.
That difference matters. Understanding how a specific virus travels from person to person explains why some sweep through entire communities overnight while others stay contained. It's also what tells you what you actually need to worry about — and what you don't.
4. Should I be concerned about Hantavirus?
Most Hantavirus strains can't spread between people — but there's one exception worth knowing about. The Andes virus, found in parts of Argentina and Chile, has a rare and documented ability to pass from person to person. Even then, it typically requires sustained close contact — think prolonged exposure between household members or healthcare workers treating infected patients.
What makes the Andes strain particularly serious is its fatality rate: roughly 40%, making it one of the deadliest Hantavirus variants known today.
See our Hantavirus page for more information.
5. What is Norovirus and how contagious is it?
If you've ever been struck down by sudden, intense nausea with nowhere to hide, there's a good chance Norovirus was the culprit.
Often mislabeled as the "stomach flu," Norovirus actually has nothing to do with influenza — it's its own beast entirely. What it causes is acute gastroenteritis, which is a clinical way of saying your stomach and intestines are inflamed and very unhappy. The result? Vomiting and diarrhea that seem to come out of nowhere and hit fast.
The good news is it usually doesn't last long. Most people feel human again within one to three days. The catch? You can still spread it to everyone around you for a few days after you've recovered — which is a big part of why Norovirus tears through schools, cruise ships, and office buildings so efficiently.
6. Is Ebola easy to contract?
Ebola is terrifying in the headlines — but it's actually harder to catch than most people think.
It's classified as a hemorrhagic fever virus, meaning it causes severe inflammation and tissue damage throughout the body, interferes with the blood's ability to clot, and can lead to internal bleeding. Six species of the virus have been identified, though only four are known to cause disease in humans.
Unlike a cold or the flu, Ebola doesn't travel through the air. It spreads through direct contact with the bodily fluids of someone who is sick or has died from the disease — blood, saliva, sweat, tears, mucus, vomit, feces, breast milk, urine, and semen — or by touching surfaces contaminated with those fluids. Symptoms can include confusion, trouble breathing, bleeding from the nose and eyes, nausea, vomiting, and diarrhea.
If you've recently traveled to an area with a known Ebola outbreak, or been exposed to animals that carry the virus, contact a health professional for guidance and testing.
7. How can companies like Aftermath help?
When Norovirus, Hantavirus, Ebola, or any biohazard contamination is involved, cleanup isn't something you handle with household supplies. The same bodily fluids that transmit these viruses can linger on surfaces long after the immediate danger seems to have passed — and that's not a risk worth taking.
That's where specialists like Aftermath come in. With more than 30 years of experience in biohazard remediation, their teams are trained to fully decontaminate spaces exposed to potentially infectious bodily fluids, restoring them to safe, usable condition. It's the kind of work that requires proven methods and serious expertise — which is why law enforcement, first responders, and families have trusted Aftermath for decades.