**1. Introduction**

Coronavirus disease 2019 (COVID-19) was reported by the World Health Organization (WHO) as a pandemic in 2020 [1]. The spread of the infection is still ongoing in spite of the hard trials to provide potent drugs and vaccines [2]. There is a growing concern about the importance of complementary and alternative medicine (CAM) in treating many infectious diseases [3, 4]. The effect of CAM on the improvement of the symptoms and outcome of SARS-CoV-2 infection was highlighted in multiple reviews [5–8].
