Abstract
Pulmonary diseases have been increasing for decades, which are responsible
for the high incidence of morbidity and mortality all over the world. Since the year
2019, the world suffers from coronavirus disease 2019 (COVID-19) which is caused by
SARS-CoV-2 and it was classified as a pandemic respiratory disease by the World
Health Organization (WHO). The problem of this virus is the lack of a medicine or a
specific antivirus drug to combat it, so many approaches have been designed to protect
the patients from its symptoms and side effect and also to raise the human innate
immunity. Consequently, this chapter will provide an overview of herbs and their
derived natural products which have anti-inflammatory, immunomodulatory, and anti-microbial activities which might be beneficial for the discovery of structurally-related
compounds that can be candidate therapeutics alleviating the symptoms associated with
acute respiratory diseases.