The F.D.A. is investigating the sources of cinnamon and other ingredients produced outside the U.S. as the possible cause of lead poisoning in dozens of children. Advocates are urging mandatory testing of lead in food.
There is no clear path for African patients to get access to the treatments, which have multimillion-dollar price tags and are highly complex to manufacture and deliver.
The proposal has elicited mounting opposition from tobacco companies, Black activists worried about police enforcement and small businesses, as President Biden moves into an election year.