The only manufacturer of Yellow Fever vaccine in the United States has had a problem producing the vaccine and has been unable to ship any for several weeks. The problem is expected to extend into December.
This is a real problem for some travelers since Yellow Fever vaccine is required to get a visa or to enter certain countries. We are doing our best to assist travelers and urge that they call us asap if they anticipate that there travel plans will include countries where the vaccine is required for entry.