Influenza Vaccine 2021 - 2022. Posted on September 30, 2021 by Wilmington Pediatrics. Wilmington Pediatrics will be having an in house flu clinic for our patients on Thursday, November 11, 2021 from 5:00PM - 7 PM in our office. If you would like to attend our flu clinic, please call 978-988-6203 to pre-register..