The Sullivan County Regional Health Department Is Expanding Covid-19 Vaccine Eligibility To All Tennesseans Who Are At Least 16 Years Of Age Starting Today. Those Under 18 Years Of Age Must Be Accompanied By A Parent Or Guardian To Receive Their Vaccine. Starting Next Monday, Appointment Hours Will Be Extended On Tuesdays And Thursdays From 8 To 6. Appointments Are Open For First Doses Of Pfizer At Whitetop Creek Park And The Kingsport Civic Auditorium.