In Parashat Tazria-Metzora, the kohanim (priests) check the people for skin ailments and determine whether or not they are in a state of ritual purity to enter the Temple. The tie reflects the medical angle of the the Torah portion. For more insights, check out the G-dcast videos on Tazria and Metzora.
http://m.youtube.com/#/watch?v=h6bPAyPCYu4&desktop_uri=%2Fwatch%3Fv%3Dh6bPAyPCYu4
http://m.youtube.com/#/watch?v=gZbsQv77YtM&desktop_uri=%2Fwatch%3Fv%3DgZbsQv77YtM
Rabbi Ed Bernstein 
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