EXECUTIVE SUMMARY Page ii Denver Metro Chamber of Commerce The Impact of I-70 Congestion on Colorado â Denver to Grand Junction Business Impacts: The lure of Coloradoâs quality of life enhances business recruitment and retention efforts; I-70 congestion may make economic development efforts more difficult.
The development of effective vaccines to prevent paralytic polio was one of the major medical breakthroughs of the 20th century. Two different kinds of vaccine are available, an inactivated (killed) polio vaccine (IPV) and a live attenuated oral polio vaccine (OPV). The presence of neutralizing antibody against polioviruses is considered a reliable correlate of protection against poliomyelitis.
annoying response here but...why would you only want to be protected against pertussis? Diphtheria, tetanus and polio are also pretty worth avoiding too :) the real answer is that when delivering a vaccination programme, you want to give the least number of injections for the most amount of protection. Combining vaccines is a very effective way of doing this.