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.
The literal meaningâspread by touch or direct contactâhas given way to a looser usage and the term is now used simply to mean âinfectiousâ. Chickenpox, once thought contagious is now known to be spread by droplets; the common cold, once thought to be spread by droplets is now known to be literally contagious.