Apr 18, 2012 i
San Rafael - An investigation by California doctors has
revealed that the state's latest outbreak of whooping cough centered around
children who had already received the whooping cough vaccine, Reuters
reports.
The study, led by infectious disease specialist Dr. David Witt, was
initiated after an unusually large number of whooping cough cases were
admitted to Kaiser Permanente Hospital in San Rafael, California in 2010.
After examining the records of juvenile whooping cough patients over an
8-month period, the doctors discovered that 81 percent of patients had
received the full series of whooping cough shots, and 11 percent had
received only some of the shots. The remaining 8 percent had not received
any immunizations for whooping cough.
"What was very surprising was
the majority of cases were in fully vaccinated children," Witt said.
"That's what started catching our attention."
After further analysis, Witt and his team surmised that the effectiveness of
the vaccine wears off after several years, creating the need for additional
inoculations.
Unfortunately, drug maker Glaxo Smith Kline (GSK), the manufacturer of the
whooping cough vaccine, did not bother to perform long-term studies of its
effectiveness. A company spokesperson confirmed this disturbing fact in an
email to Reuters, stating that GSK never studied the duration of the
vaccine's protection after the shot was given to four- to six-year-olds.
Dr. Tom Clark, a medical epidemiologist with the Center for Disease Control
(CDC), also provided a troubling analysis of the situation. "It's likely if
we move doses around we'd shift the burden of disease, but not necessarily
reduce it," he said.
However, these explanations alone do not account for the new epidemic of
whooping cough in California. According to the
New York Times, vaccination rates have remained steady as cases of
whooping cough have skyrocketed in the state.
In addition, other scientific studies have confirmed a link between vaccines
and an increased risk of infectious diseases.
In 2009,
four
separate Canadian studies concluded that the seasonal flu shot massively
increases the likelihood of contracting the H1N1 flu. According to Science
Daily, recipients of the seasonal flu vaccine were up to 250% more likely to
be infected by the H1N1 variant than those who did not receive the
injection.
Revelations like these should be a reminder to parents to do as much
research as possible and weigh the risks and benefits before allowing their
children to receive vaccines.