Overview 1, 2, 3, 4, 5 Pertussis is a highly communicable, vaccine-preventable disease that affects the respiratory tract. The illness is caused by Bordetella pertussis (B. pertussis) bacteria, for which humans are the only known natural reservoir.verview 1, 2, 3, 4, 5 Pertussis is a highly communicable, vaccine-preventable disease that affects the respiratory tract. The illness is caused by Bordetella pertussis (B. pertussis) bacteria, for which humans are the only known natural reservoir.
Often, cramps. 1  a sudden, involuntary, spasmodic contraction of a muscle or group of muscles, especially of the extremities, sometimes with severe pain. 2  a piercing pain in the abdomen.
A muscle cramp is when a muscle in the body tenses or stiffens up. The cramps are sharp, sudden, and involuntary. Most muscle cramps are not an emergency. Simple stretching and massage can help.To prevent muscle cramps, stretch before bed, drink lots of liquids, and avoid exercising too hard when it is hot outside. muscle cramp is when a muscle in the body tenses or stiffens up. The cramps are sharp, sudden, and involuntary. Most muscle cramps are not an emergency. Simple stretching and massage can help.