Efluelda Tetra is a high‑dose, quadrivalent influenza vaccine given by injection into the muscle. It contains inactivated (killed) flu viruses that represent the most common strains expected each season. The vaccine works by teaching the immune system to recognize these flu viruses, helping to prevent influenza infection in older adults.

Spikevax is a COVID‑19 mRNA vaccine (also known as Moderna’s Spikevax) administered as an intramuscular injection. It contains messenger RNA that provides the body’s cells with the instructions to make a harmless piece of the coronavirus spike protein. This triggers an immune response that protects against COVID‑19 infection.

mCOMBRIAX is a combined vaccine that includes mRNA components for both influenza and COVID‑19. The influenza part targets the H1N1, H3N2, and B strains of flu, while the COVID‑19 part encodes key portions of the SARS‑CoV‑2 spike protein (specifically the XBB.1.5 variant). Given by injection, this single vaccine is designed to stimulate the immune system to protect against both flu and COVID‑19 in one shot.

COVID-19 – COVID-19 is a viral infection caused by SARS‑CoV‑2 that mainly involves the respiratory system. It often starts with fever, cough, and fatigue and can spread to the lower airways. The illness may progress from mild upper‑respiratory symptoms to more extensive lung involvement, increasing breathing difficulty. Some individuals also experience muscle aches, headache, or loss of taste and smell. Symptoms usually peak within the first week and then begin to improve.

Influenza – Influenza is an acute respiratory infection caused by influenza viruses, most frequently types A and B. It begins suddenly with fever, chills, headache, and muscle aches, followed by cough and sore throat. The virus moves through the airways and can spread from the upper to the lower respiratory tract. Symptoms typically worsen over two to three days and then gradually resolve over about a week. Occasionally, a lingering cough or fatigue may persist after the acute phase.