National Public Health Act of 2019 This bill requires the Department of Health and Human Services (HHS) to take a series of actions relating to the impact of certain products on public health. Specifically, HHS must (1) contract with the National Academy of Medicine, or a similar entity, to develop a list of public health crises; (2) develop a list of products that have a specified fiscal impact on the national public health system; and (3) require manufacturers of such products to develop and implement a plan to mitigate the effects of the products on public health.