Zinc is essential for the maintenance of immune system strength and gland health. It can be rapidly depleted when the body is fighting an illness such as cold and flu.

Zinc may be key to stopping novel coronavirus from replicating. In vitro study found increasing intracellular Zn2+ (mineral) concentration w zinc- ionophores can efficiently impair the replication of coronaviruses. In vitro, chloroquine was found to be a zinc ionophore.