Why hygiene is our best defense

When most people think of “public health," they think of massive hospitals or government mandates. But public health starts at the bathroom sink and in the shower. It’s about more than personal hygeine - it's microbial management. This is the systematic regulation, manipulation, and optimization of microbial communities, their composition, and their metabolic activities to achieve specific environmental, agricultural, industrial, or health-related goals. We live in a world crawling with germs and if we want everyone to stay healthy, we have to take hygiene seriously.

Handwashing: The 20-second power move

Handwashing can be considered the ultimate “low-tech/high impact” hack. The things we touch throughout the day -- a phone, a door handle, a railing on the bus -- are called “fomities.” Fomites are objects that carry bacteria and risk of infection.

When we use soap, we aren’t just rinsing gems off; we’re actually destroying them. Many viruses have a fatty outer layer called a lipid envelope, which is a protective outer layer found on certain viruses, composed of a phospholipid bilayer and embedded proteins. It is derived from the host cell's

membrane. Soap molecules are designed to break that fat apart, basically popping the germ like a balloon.

By washing our hands, we’re helping prevent the consumption and spread of germs. Thus handwashing is one of the most effective tools we have for preventing illness. According to the Centers For Disease Control and Prevention, proper handwashing with soap can reduce diarrheal illnesses by about 30% and respiratory illnesses by about 20%. Something as simple as washing your hands for 20 seconds can significantly reduce how often people get sick in everyday environments like schools, workplaces, and homes.

The Importance of Showering

Showering is another huge pillar of disease prevention. Our skin is our largest organ and our primary barrier against the outside world. Throughout the day, we accumulate a biofilm of sweat, dead

skin cells, and environmental pollutants. The World Health Organization emphasizes that maintaining clean skin and proper hygiene practices help reduce the spread of infectious diseases and protects vulnerable populations whose immune systems may not be as strong.

If we don’t shower or bathe the following can happen:

1. Pathogen Accumulation: harmful bacteria can start to colonize the skin, increasing the risk of infections if we get a tiny scratch or cut.

2. Skin Integrity: keeping the skin clean helps maintain its pH balance, which is vital for its role as an immune barrier.

Why this matters

Health is a team sport. When one person gets sick, it ripples out. It means missed school, missed work, stress for families, and risk to longevity. When we keep ourselves clean, we are reducing the “germ load” in our environment, making the world safer for people whose immune systems might not be as strong as ours. If we can all commit to these simple routines, we’re not just staying clean-we’re looking out for each other.

Written by pre-med student Chelsie Nelson

Edited by Mallory Kane, MD

References:

1. Centers For Disease Control and Prevention: (2023). Show me the science - why wash your hands? https://www.cdc.gov/handwashing

2. World Health Organization:(2022). Hygiene and Health Guidelines. https://www.who.int