The answer to 'are cockroach dangerous' is yes, cockroaches can pose some health risks to humans. Cockroaches can carry and spread a variety of bacteria, viruses, parasites, and fungi that can cause illnesses in people. They can contaminate food preparation surfaces and utensils, and their droppings and shed skin can trigger allergic reactions and asthma attacks in some individuals.
Cockroaches are also known to spread diseases such as salmonella, dysentery, gastroenteritis, and polio. Their presence in the home can also indicate larger issues with sanitation and cleanliness that should be addressed to maintain a healthy living environment.