Jeffrey Jon Shaw OBE, FLS, FASTMH (born 12 July 1938) is a British parasitologist who began working in Latin America in 1962.

Although officially retired, he is presently a Senior Professor at São Paulo University's Biomedical Sciences Institute where he continues his research in its Parasitology Department.

During World War II he was evacuated and spent his early childhood in the village of Rothley, Leicestershire, whose surrounding countryside became his playground and fostered his love of nature.

The field work for his doctoral thesis on the life cycle of Endotrypaum was performed in Central America in 1962 with Wellcome Trust support.

In the early 1960s, he and his colleague Alister Voller pioneered the use of indirect immunofluorescent techniques for the diagnosis of visceral leishmaniasis and Chagas Disease.