Workers’ compensation; presumption of compensability for certain diseases. Adds cancers of the colon, brain, or testes to the list of cancers that are presumed to be an occupational disease covered by the Virginia Workers’ Compensation Act when firefighters or certain employees develop the cancer. The presumption shall not apply for any individual who was diagnosed with one of the conditions before July 1, 2020. The measure removes the compensability requirement that the employee who develops cancer had contact with a toxic substance encountered in the line of duty. The bill also reduces the number of years of service needed to qualify for the presumption from 12 to five for various types of cancer. For hypertension or heart disease, the bill adds a requirement that an individual complete five years of service in their position in order to qualify.