Evaluating the Efficacy and Safety of EZC Pak, a 5-Day Combination Echinacea-Zinc-Vitamin C Dose Pack with or without Vitamin D, in the Management of Outpatient Upper Respiratory Infections

Radhakrishnan A, Spencer S, Yanamala N, Malepati S

Infection and Drug Resistance 2023, 16:2561-2572

Published Date: 3 May 2023