States in the United States are taking measures to prevent the stockpiling of drugs for malaria, hydroxychloroquine and chloroquine, in order to maintain supply in the event of severe demand.Currently, at least 20 states in the United States have implemented emergency restrictions or guidelines to relieve the demand pressure of patients with autoimmune diseases.

In order to limit the number of prescriptions, some states require pharmacists to ensure that patients are tested positive for new coronavirus before filling out prescriptions. The supply of medicine was tight last month.

Neither drug has been shown to work with covid-19, but some research is underway. Doctors are adding them to standard care and finding that in some cases, they have some effect in reducing recovery time.

Both of these substances can play a role in the immune system, preventing some patients with severe new crown from acute attack. Some U.S. pharmaceutical companies have donated millions of such drugs, while others are increasing production.