The maximum incubation period for plague can be up to 12 days and varies from plague to plague. The incubation period can range from a few hours to 3 days for primary pneumonic plague and around 2-5 days for glandular plague. The incubation period can be longer in people who have vaccinations. The most common form of the disease is glandular plague, which, in addition to having the common manifestations of glandular plague, is most often characterized by enlarged lymph nodes at the site of involvement. Pneumonic plague, both secondary and primary, is characterized by severe chest pain and coughing up pink, frothy sputum. The most serious type is fulminant plague, which has the highest mortality rate and is the most dangerous type of disease.