Question

There were about 25,000 pertussis cases reported annually in the USA in 2004 and 2005. It is almost 3 times increase if compared to the number of cases reported in the USA in 2003 or 2007. What had caused the increase in reported pertussis cases in 2004-2005?

Answer 1

Answers cases of pertussis, also called whooping cough, have been climbing over the past decade and half. The disease, which courses severe coughing for months at a time and con cause death in infants, steadily declined over several decades after a vaccine Become widely used in the 1940s - Cases Reached their lowest rates in the 1970s and early 1980s, with Just ,000-3,000 Coses a year then cases started increasing Again, Slowly at first, in the late 80s and especially late 90s, though still Remaining Below 8,000 coses a year, then the 2000s. brought Back numbers not seen since the 1960s: Every year since 2003 has had at least 10,000 cases, more Recently hovering in the 20,000s. The 2012 widespread outbreaks o pertussis involved on estimated 98,277 Coses, the highest inciduce since 1955 - the us had 17,972 Cases in 2016, with six insont deaths. So what's been going on?

2) welve had a whooping elve had a vaccime since the 40s, why have ooping cough couses increased so much, especially when nearlly all other vaccine - preventable discase have almost disappeared? three main porus Are Responsible: Jailured the Vaccines protection to lost long enough, Incomplete vaccine coverage (especially among Adults) and normal population turnover, the high effectivimess of the pertussis Valline has been widely accepted and Supported by the evidence, but multiple Studies have shown how its protection wears of over time. In fact, Researches have known for at least 6 years that the vaccine's waning Immunity- not a shoddy vaccine to start with – has contributed to Rising cases, especially among Adolescents the Combo of that woning with poor Adult Coverage is also well established, one reason for the

Recommendation that pregnant women get a dap booster in each pregnancy. (Tdap is the pertussis Vaccine for Adults, mot a Badidea for dad either). And Researcher also know that elementary age children and teenagers are motor Sources of transmission But while the study's findings Aren't med, they Are voluable Because they support the previous. epidemiological evidence - the observational studies on how the discose spreads-on Woning with an entirely different Method Mathematical Models, this study relies on complex tronsmission models and sound support for post findlings, on Important part of Scientific process.