At Physicians Now, we carry • Quadrivalent vaccine, which protects against two strains of influenza A and B viruses. Senior citizens, 65 years and older, have available the High Dose quadrivalent flu vaccine. Speak with our providers or health care providers about which of these flu vaccines is the right option for you and your family. We serve patients from Rockville MD, Travilah MD, Lone Oak MD, Colesville Park MD, Redland MD, Darnestown MD, Anscroft MD, and Wheaton-Glenmont MD.