New World Health Organization (WHO) guidelines and handbook on systematic screening for active tuberculosis were published in March 2021. The handbook cites two studies from Ph.D. […]
In residents of northern latitudes, the content of vitamin D in the body varies naturally throughout the year. This coincides with varying exposure to sunlight, which […]
Last week, the chief executive of Pfizer said anyone who receives its COVID-19 vaccine will probably need to have a third dose within 6-12 months after […]