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Yellow fever was the first human disease to have a licensed vaccine and has long been considered important to understanding how epidemics break out and should be combated. It was introduced to the Americas in the 17th century, and high death rates have resulted from successive outbreaks since then. Epidemics of yellow fever were associated with the slave trade, the U.S. gold rush and settlement of the Old West, the Haitian Revolution, and construction of the Panama Canal, to cite only a few [...]

The abundant presence of an enzyme known as low molecular weight protein tyrosine phosphatase (LMWPTP) in tumor cells has long been considered an indicator of cancer aggressiveness and metastatic potential. It is also known to perform important functions in cells under normal conditions, participating both in the proliferation process and in the regulation of intracellular systems. Research continues on its role in the progression of cancer. In Brazil, a group of researchers from the Bioassay [...]

Researchers in the University of São Paulo’s School of Physical Education and Sports (EEFE-USP) in Brazil compared the effect of two widely used classes of anti-hypertensive drugs on post-exercise hypotension, an expected and beneficial fall in blood pressure after a session of aerobic exercise, especially in the late afternoon or early evening. According to the researchers, the findings of their study can help health professionals choose the most beneficial time of day for [...]

Oxytocin, produced by the hypothalamus and sometimes known as the “love hormone” for its involvement in pair bonding and orgasm, can be a strong ally in the control and prevention of osteoporosis, according to a study by scientists at São Paulo State University (UNESP) in Brazil. The study showed that when administered to female rats at the end of their fertile period, the hormone reversed precursors of osteoporosis, such as reduced bone density, decreased bone strength and [...]