....of Jonas Salk's birthday.

From Wiki:

Jonas Edward Salk (/sɔ�lk/; October 28, 1914 – June 23, 1995) was an
American medical researcher and virologist. He discovered and developed
the first successful inactivated polio vaccine. He was born in New York
City to Jewish parents. Although they had little formal education, his
parents were determined to see their children succeed. While attending
New York University School of Medicine, Salk stood out from his peers,
not just because of his academic prowess, but because he went into
medical research instead of becoming a practicing physician.

Until 1957, when the Salk vaccine was introduced, polio was considered
the most frightening public health problem of the post-war United
States. Annual epidemics were increasingly devastating. The 1952
epidemic was the worst outbreak in the nation's history. Of nearly
58,000 cases reported that year, 3,145 people died and 21,269 were left
with mild to disabling paralysis,[1] with most of its victims being
children. The "public reaction was to a plague," said historian Bill
O'Neal.[2] "Citizens of urban areas were to be terrified every summer
when this frightful visitor returned." According to a 2009 PBS
documentary, "Apart from the atomic bomb, America's greatest fear was
polio."[3] As a result, scientists were in a frantic race to find a way
to prevent or cure the disease. U.S. president Franklin D. Roosevelt was
the world's most recognized victim of the disease and founded the
organization, the March of Dimes Foundation, that would fund the
development of a vaccine.

In 1947, Salk accepted an appointment to the University of Pittsburgh
School of Medicine. In 1948, he undertook a project funded by the
National Foundation for Infantile Paralysis to determine the number of
different types of polio virus. Salk saw an opportunity to extend this
project towards developing a vaccine against polio, and, together with
the skilled research team he assembled, devoted himself to this work for
the next seven years. The field trial set up to test the Salk vaccine
was, according to O'Neill, "the most elaborate program of its kind in
history, involving 20,000 physicians and public health officers, 64,000
school personnel, and 220,000 volunteers." Over 1,800,000 school
children took part in the trial.[4] When news of the vaccine's success
was made public on April 12, 1955, Salk was hailed as a "miracle worker"
and the day almost became a national holiday. His sole focus had been to
develop a safe and effective vaccine as rapidly as possible, with no
interest in personal profit. When asked who owned the patent to it, Salk
said "There is no patent. Could you patent the sun?"[5] The vaccine is
calculated to be worth $7 billion had it been patented.[6]

In 1960, he founded the Salk Institute for Biological Studies in La
Jolla, California, which is today a center for medical and scientific
research. He continued to conduct research and publish books, including
Man Unfolding (1972), The Survival of the Wisest (1973), World
Population and Human Values: A New Reality (1981), and Anatomy of
Reality: Merging of Intuition and Reason (1983). Salk's last years were
spent searching for a vaccine against HIV. His personal papers are
stored at the University of California, San Diego Library.[7]
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