Background Pertussis or whooping cough is a vaccine-preventable, highly contagious, respiratory il
In June 2016, an outbreak of an unknown disease was reported to affect clusters of families in two r
Estimates were produced for diphtheria-pertussis-tetanus (DPT) vaccine coverage and dropout for chil
In the history of mankind, the black death, small pox and influenza pandemics have threatened our ex