William Christoffel, Washington County's health officer, expected the 16 people staffing the phones Monday to receive about 3,500 calls from people who wanted to schedule appointments for the county's first public influenza vaccination clinic of the year.
Instead, about 2,200 people called, he said.
Christoffel encouraged those people considered at "high risk" for complications should they come down with the flu to call today or Wednesday to register to get the vaccination.
The Health Department has about 4,500 doses of the vaccine to distribute, he said. The vaccinations will be given, by appointment only, on Nov. 29 and Nov. 30.
To register, people may call 240-313-3220 today from 7 a.m. to 5:30 p.m. or Wednesday from 7 a.m. to noon. Participants must prove they are Washington County residents.