Which Illnesses Spread the Fastest? Let’s Break It Down
August 29 • 2025
Ever wonder which illnesses spread the fastest? Some viruses are more contagious than others, making it crucial to know how to protect yourself. Here’s a breakdown of the most rapidly spreading illnesses and how to reduce your risk.
In the video below, Dr. Kim Nguyen discusses how the most common and most contagious illnesses spread and ways to protect you and your family.
The Common Cold
The common cold spreads easily through sneezing, coughing, and touching contaminated surfaces. Since it can linger on surfaces for hours, frequent hand-washing is your best defense.
The Flu
The flu is highly contagious—even before symptoms appear. This means you could be spreading the virus without even knowing it. The best way to protect yourself? Get your flu shot every year.
Norovirus (Stomach Bug)
Norovirus, commonly known as the stomach bug, spreads through contaminated food, surfaces, and close contact. It only takes a tiny amount of the virus to make you sick. To avoid it, wash your hands thoroughly with soap and water, as hand sanitizer isn’t as effective against this virus.
COVID-19
COVID-19 remains highly contagious due to airborne transmission. It can spread through droplets from talking, coughing, or sneezing. Staying up to date on vaccinations and wearing a mask in crowded areas can help reduce exposure.
RSV (Respiratory Syncytial Virus)
RSV is particularly dangerous for babies and older adults. It spreads through sneezing, coughing, and touching contaminated surfaces. Frequent hand-washing and avoiding contact with sick individuals can help protect vulnerable populations.
Stay Healthy & Prevent the Spread
Knowing how these illnesses spread is the first step in protecting yourself and others. Prioritize hand hygiene, vaccinations, and staying home when sick to help stop the spread of infections in your community. Need to get up to date on your flu vaccine? Stop by and see us or schedule an appointment.