维生素C可促使干扰素在体内大量产生，从而可以增强免疫功能，预防各种感染性疾病和癌症。 2020年1月22日，上海卫生健康委药政管理处最先明确把维生素C列为预防新冠药品。On January 22, 2020, the Drug Administration Office of Shanghai Health and Health Commission was the first to explicitly list vitamin C as a drug to prevent COVID-19.
2020年1月27日，山东省新型冠状病毒感染的肺炎疫情处置工作领导小组（指挥部）也发文，号召大家尽量不用空调，加强营养摄入，适当补充维生素C。It is called on everyone to avoid air conditioning as much as possible, strengthen nutrition intake and supplement vitamin C appropriately.
