The scientific method is a body of techniques for investigating phenomena, acquiring new knowledge, or correcting and integrating previous knowledge. To be termed scientific, a method of inquiry is commonly based on empirical or measurable evidence subject to specific principles of reasoning.
Chickenpox (varicella) is a contagious illness that causes an itchy rash and red spots or blisters (pox) all over the body. Chickenpox can cause problems for pregnant women, newborns, teens and adults, and people who have immune system problems that make it hard for the body to fight infection.
Up to 20 percent of adults who get chickenpox can develop severe complications such as pneumonia. Other rare complications from chickenpox include serious bacterial infection of the lesions (cellulitis) and brain inflammation, which is reported in less than one percent of children who get chickenpox.