I work with computers
buy calcium acetate
In 1953, on the retirement of Dr William Frazer, Semple was promoted to MOH for Liverpool, simultaneously taking on the positions of port medical officer and professor of public health at the University of Liverpool. He now had full responsibility as the city entered its postwar economic decline. There were persistently high rates of infectious diseases such as tuberculosis, which Semple tackled with boldness and creativity. He devised a mass x-ray campaign to run in 1959. Requisitioning mobile x-ray vans from around Britain, he urged every Liverpool resident ??? around 500,000 people ??? to attend for a chest x-ray to uncover asymptomatic tuberculosis cases.