“It
is time to close the book on infectious diseases, and declare the war against
pestilence won,” Surgeon General William Stewart is rumored to have said when
testifying before Congress in 1969 (though whether he actually said this is debatable).In the 1960s and 1970s, most of society believed that diseases
were a thing of the past. Polio had been eradicated by vaccines and penicillin made
bacteria relatively harmless. With many of the known diseases conquered,
society had good reason to feel safe.
That security was short-lived. In
1976, Ebola was discovered after it appears to have mutated from bats. In the
early 1980s, HIV/AIDS appeared, morphing from two similar diseases found in
chimpanzees. Before these diseases were fully understood, fear was the new
prevailing attitude returning society to the pre-60s outlooks. "'Emergence'
is in fact regression, a return to the standard that prevailed universally in
the previous century," Nobel Laureate and Columbia biologist Joshua
Lederberg wrote in a special infectious disease issue of the Journal of the
American Medical Association.
Now, not only do we have new
diseases to handle, the old ones are making a comeback. The World Health Organization
(WHO) has identified six diseases whose worldwide re-emergence should be
monitored: diphtheria, cholera, dengue fever, yellow fever, and bubonic plague (That’s
right, guys. The Black Death of the Dark Ages is on the list of re-emerging
diseases).
Though the list might be helpful to
focus health officials, it also limits what diseases they are watching and
health officials are aware of it. "Scarlet fever was a problem for my
mother's generation," says Stephen
Morse of the epidemiology division in Columbia's School of
Public Health. "It essentially disappeared, and for no good
reason. We don't understand why [diseases] flare from time to time, and until
we do I'm uncomfortable ignoring them.”
The Council of Foreign Relations
recently released a map that shows the recent resurgence of measles (maroon),
mumps (olive green), rubella (blue), polio (gold), whooping cough(light green),
and others (yellow). The circles are localized outbreaks, while the size of the
circle indicates the number of people infected.
If you look, measles have
re-emerged in Europe and whooping cough in the United States. The Wakefield
study in 1998, which I wrote about here, made many parents worry that the measles, mumps, and
rubella vaccine was dangerous. Though this was later proven false and Wakefield
found to have a conflict of interest, fears still resonate and immunization
rates reflect this.
“Viruses and bacteria have taken
full advantage of the immunization gaps. In 2011, France reported a massive
measles outbreak with nearly 15,000 cases. Only the Democratic Republic of
Congo, India, Indonesia, Nigeria and Somalia suffered larger measles outbreaks
that year. In 2012, the U.K. reported more than 2,000 measles cases, the
largest number since 1994. Here in the U.S., the prevalence of whooping cough
shot up in 2012 to nearly 50,000 cases. Last year cases declined to about
24,000 — which is still more than tenfold the number reported back in the early
'80s when the bacteria infected less than 2,000 people,” according to a
newscast from the national public radio (NPR).
In addition, though you may not
think much about it, the flu could be problematic in the future. Though
relatively harmless now, influenza could evolve into an epidemic or pandemic
level. The antigens it displays to our immune system change every year
regardless, which is why nurses are required to renew their flu vaccine
annually. The flu already kills 36,000 people a year in America alone. I, for
one, am not tempted to wait and see what strain evolves into something worse.
While the WHO and other
organizations such as the Center for Disease Control (CDC) and the department
of Pandemic and Epidemic Diseases (PED) have been taking measures to counteract
these issues, some factors remain out of their hands. The decision to vaccinate
children is left to the parents. After the Wakefield scare, many parents
decided to forgo vaccines instead of risk any side effects that vaccines were
rumored to have. "In England, they did the experiment: They simply stopped
vaccinating for pertussis. And they wound up with a lot of sick kids. In this
country, we are now seeing the waning of immunity," says Dr. Glenda
Garvey, Columbia clinical professor of medicine and interim chief of infectious
disease at Columbia-Presbyterian Medical Center.
According to Steve Mirsky,
“The diphtheria situation in the
former Soviet Union involves a more serious disease combined with a crumbling
public health infrastructure; organized vaccination efforts are in shambles.”
But wait, it gets worse. According
to IFLScience,
“Gary Baum of The Hollywood
Reporter has investigated childhood illness and vaccination rates around Los
Angeles County. He discovered that some schools in the most affluent L.A
neighborhoods have vaccination rates lower than Southern Sudan. Let that sink
in for a minute; one of the poorest regions in the world that is unable to
supply clean drinking water for half of its inhabitants has a greater
vaccination rate than schools that educate the offspring of Hollywood’s elite.”
The
lowered rates of vaccines increase the risk of epidemics which could lead to
pandemics. A pandemic covers a much wider geographical area, often worldwide. A
pandemic also infects many more people than an epidemic. An epidemic is
specific to one city, region or country, while a pandemic goes much further
than national borders. In order to avoid
any disease reaching these levels, it is essential that health organizations
work together.
"First, you need
surveillance," says Bob Howard of the CDC's National Center for Infectious
Diseases. "You also have to have science that is up-to-date and capable of
dealing with what you discover in the field. Once you do, you want to have
appropriate prevention and control in place, and that includes communication to
let people know what the threats are and how to control or prevent the spread
of that disease threat. Finally, there's got to be that strong public health
infrastructure in place. If you don't have a system in place, the three
previous things will not work." Basically, in the words of Mad-Eye Moody,
“Constant vigilance!”
Sources:
http://www.npr.org/blogs/health/2014/01/25/265750719/how-vaccine-fears-fueled-the-resurgence-of-preventable-diseases
http://www.columbia.edu/cu/21stC/issue-2.3/mirsky.html
http://cid.oxfordjournals.org/content/47/2/294.1.full
http://www.avert.org/origin-hiv-aids.htm
http://www.postandcourier.com/article/20141019/PC05/141019524/1177/understanding-risk-stop-worrying-about-ebola-and-go-get-a-flu-shot
http://www.iflscience.com/health-and-medicine/vaccination-rates-plummet-elite-los-angeles-schools


