Why do you sometimes get sick?

You can get sick due to various factors, including exposure to pathogens like viruses and bacteria, weakened immune responses, and environmental influences such as pollution or allergens. Lifestyle choices, such as poor nutrition, lack of sleep, and high stress, can also contribute to illness. Additionally, genetic predispositions may make some individuals more susceptible to certain diseases. Overall, illness often results from a combination of these factors impacting the body's ability to defend itself.