https://chroniclingamerica.loc.gov/lccn/sn95066012/1918-12-23/ed-1/seq-6/

The Vicks Drug Company warns the retail drugstores that supplies off Vaporub are extremely low due to the influenza outbreak. The retailers will need to look to wholesalers for new stock. Thirty thousand troops are being discharged every day from the US Army.

Source: “Notice Retail Druggists no More Vaporub Direct But it From Your Jobbers,” The Bennington Evening Herald, Bennington, Vermont, December 23, 1918. Page 6, Column 1.