adults account for less than 5% of all cases in the United States.
Yes, older adults can get chickenpox if they haven't had it before.
90% of adults are immune to chickenpox because it is a highly contagious disease that causes lifelong immunity. Most people got chickenpox as children prior to the approval of chickenpox vaccine.
Chickenpox is not usually fatal, but is more likely to kill teenagers and adults than it is to kill infants and children (see related link). Deaths and hospitalizations from chickenpox have dropped 90% in the US since introduction of chickenpox vaccine in 1995.
Adults, however, are much more likely than children to suffer dangerous complications. More than half of all chickenpox deaths occur among adults.
Children as a group are more likely to get chickenpox because they are less likely to have had chickenpox previously. Chickenpox is highly contagious, and usually confers lifelong immunity, so adults are likely to be immune. In countries without routine vaccination, 90% of adults are immune to chickenpox due to previous infection.
Chickenpox may start out seeming like a cold: You might have a runny or stuffy nose, sneezing, and a cough. But 1 to 2 days later, the rash begins, often in bunches of spots on the chest and face. From there it can spread out quickly over the entire body - sometimes the rash is even in a person's ears and mouth.
Study results reported by the Centers for Disease Control and Prevention (CDC) indicate that more than 90% of American adults are immune to the chickenpox virus.
Most people get chickenpox when they are young, which is good. Although children can pull through chicken pox easily, if not uncomfortably, it is much more devastating to adults. Plus, once you have it as a kid, the cells go into remission in your body, your B cells produce antibodies for chickenpox, and there's a extremely high chance that you will never get chickenpox again. But you can get it at any age.
Chickenpox can kill you but it is rare. Before chickenpox vaccine became common in the US, 100 to 150 people died each year from chickenpox. Most of these were healthy adults. Since chickenpox vaccine became more common, Rates of chickenpox deaths are down by over 95% in patients under 50, and been halved in older adults. People at highest risk for complications from chickenpox are babies, teenagers, and adults; pregnant women; and people with lower immune response, such as those with HIV, those who had organ transplants, or people on chemotherapy or long-term steroids.
Chickenpox is found worldwide. It is more common in cities in countries that don't have routine chickenpox vaccination.
At various times in the development of chickenpox, the bumps can look red, yellow, or black. Adults will often have a darker color of bumps. A blistering rash is most common in those who have never been vaccinated, but patients who have a case of chickenpox after immunization may not get blisters, but only red marks.
Chickenpox in adulthood does not have a special name. However, shingles is an infection that can result from later reactivation of your lifelong infection with chickenpox virus. It happens most often in adults.