Changes in human behaviors that contribute to decreased exposure to microbes include taking antibiotics, having purification systems such as water or cleaning, and other technological advancements. The easy access to antibiotics is a big factor that contribute to decreases in microbiota. Antibiotics wipe out both bad and good microbes. Water purification systems also reduce exposure to microbes. Additionally, hand washing, showering, and even the usage of cleaners such as hand sanitizer also play into the decrease in microbes. Furthermore, technology such as c-sections and formula feeding can also reduce vaginal microbe and lactic microbe environmental exposure for babies entering life.