Some people in your family or community may not be able to get certain vaccines due to their age or health conditions. They rely on you to help prevent the spread of diseases. Infants, older adults, and people with weakened immune systems (like those undergoing cancer treatment) are especially vulnerable to infectious diseases. For example, newborn babies are too young to be vaccinated against whooping cough. Unfortunately, whooping cough can be very dangerous or even deadly for them. Pregnant women should get the Tdap vaccine during every pregnancy to help protect their babies from whooping cough. Anyone who is around babies should be up to date with their whooping cough vaccine.