Voters in three states will go to the polls Tuesday to cast ballots for Joe Biden or Bernie Sanders, even as the coronavirus outbreak has pushed back plans for other presidential primary elections.

Arizona, Florida and Illinois will proceed as scheduled with their Democratic primaries. A joint statement from officials in those states said guidance from voting-machine makers on how best to sanitize the machines will be provided in every polling location, along with guidance from the CDC on best practices for hand washing. Ohio’s primary, which was also scheduled to take place Tuesday, has been postponed.