Self-Care for Common Colds: The Pivotal Role of Vitamin D, Vitamin C, Zinc, and<i> Echinacea</i> in Three Main Immune Interactive Clusters (Physical Barriers, Innate and Adaptive Immunity) Involved during an Episode of Common Colds—Practical Advice on Dosages and on the Time to Take These Nutrients/Botanicals in order to Prevent or Treat Common Colds

<div>Flow chart of the study selection process.</div>

Evidence-Based Complementary and Alternative Medicine

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Figure 1

Figure 1: Self-Care for Common Colds: The Pivotal Role of Vitamin D, Vitamin C, Zinc, and<i> Echinacea</i> in Three Main Immune Interactive Clusters (Physical Barriers, Innate and Adaptive Immunity) Involved during an Episode of Common Colds—Practical Advice on Dosages and on the Time to Take These Nutrients/Botanicals in order to Prevent or Treat Common Colds 

Figure 1 | Self-Care for Common Colds: The Pivotal Role of Vitamin D, Vitamin C, Zinc, and Echinacea in Three Main Immune Interactive Clusters (Physical Barriers, Innate and Adaptive Immunity) Involved during an Episode of Common Colds—Practical Advice on Dosages and on the Time to Take These Nutrients/Botanicals in order to Prevent or Treat Common Colds 