Epigallocatechin-3-gallate (EGCG) is a major polyphenol of green tea that possesses a wide variety of actions, such as anti-inflammatory, anti-fibrotic, pro-apoptotic, anti-tumorous, and metabolic effects via modulation of a variety of intracellular signaling cascades. In addition, preclinical studies have also emphasized the antiviral activity of epigallocatechin-3-gallate (EGCG), including SARS-CoV-2.

In previous studies, we found that EGCG can prevent and cure radiation-induced normal tissue damage in tumor patients. In clinical studies, we found that EGCG can prevent and treat radiation-induced acute radiation esophagitis, acute radiation skin injury, acute radiation oral mucositis with high safety. Thus, we designed this phase I-II clinical study in order to investigate the possible role of EGCG in the treatment interstitial pneumonia in tumor patients.

In this phase I study, subjects were divided into four dose groups according to the improved Fibonacci method and were given different doses of EGCG to evaluate adverse events. At the same time, the researchers conducted a phase II study of EGCG in tumor patients with interstitial pneumonia. The Phase II study was conducted with a randomized, controlled, placebo dose determined by Phase I. the subjects were divided into two groups (experimental group and placebo group). To observe the effectiveness of EGCG, the researchers will use both clinician assessment and patient self-assessment.

Inclusion Criteria:

• Diagnosed malignant tumors by pathology or cytology
• COVID-19 with a confirmed positive polymerase chain reaction or antigen test result for SARS-CoV-23
• Moderate pneumonia, according to the diagnosis and treatment standard of COVID-19 in Peking Union Medical College Hospital
• Pulmonary function of the patient can be treated with aerosol inhalation for 5-7 days

Exclusion Criteria:

• Current or recent progresses rapidly and may develop into a Critical illness with coronavirus in a short period of time
• Caused by other viruses such as cytomegalovirus, as well as pneumocystis pneumonia, pulmonary edema, aspiration pneumonia and acute interstitial pneumonia
• Any condition including medical, emotional, psychiatric, or logistical that, in the opinion of the Investigator would preclude the participant from adhering to the protocol or would increase the risk associated with study participation
• Need systemic use of immune suppressive agents