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Immunomodulator, antiviral, antibacterial, and anti-inflammatory activities (EZENAGU,

2008; García, Leiro, Delgado, Sanmartín, & Ubeira, 2003; Makare, Bodhankar, & Rangari,
2001). The place of Turmeric (Curcumin; Curcuma longa) in the Indian Kitchen is

unavoidable. It shows anti-inflammatory, anti-HIV, anti-bacterial, anti-oxidant, Nematocidal,
anti-parasitic, anti-spasmodic, and anti-carcinogenic activities due to curcuminoids, phenols,

and curcumin compounds (Belcaro et al., 2014; Dairaku, Han, Yanaka, & Kato, 2010; Kim et
al., 2010; Moghadamtousi et al., 2014; Praditya et al., 2019; Prasad, Tyagi, & Aggarwal,

2014; Rahimnia, Panahi, Alishiri, Sharafi, & Sahebkar, 2015). Similarly, Holy Basil, Parijat,

Papaya, Pomegranate, Ashwagandha, Amla, Brahmi, Bitter melon, Fenugreek, etc have been
reported to have various types of health beneficial properties (manuscript under

communication). Previously we have also reported that anti-malarial activities of Quinine,

Arabinogalactan, Curcumin, Piperine, Ellagic acid, Quercetin, Alkaloids, Flavonoids,
Cinnamic acid derivatives, and Allicin like compounds and the Indian diet is a rich source of

such components (Dalai, 2015).
DEALING WITH COVID-19

The activities of natural plant products against Coronaviruses like SARS-CoV-1 and MERS
have been explored, and the extrapolation of those data suggests promising results against

SARS-CoV-2. Among such compounds, the efficacy of Quercetin (Onions) is being critically

investigated against novel Coronavirus. Quercetin is known to have antivirus, antibacterial,
and anticancer actions. Its ability to neutralize the causative agents of respiratory or urinary

diseases is well accepted (Sharma, 2019). The potential of quercetin to kill the influenza
virus, Japanese encephalitis virus, adenovirus, respiratory syncytial virus, and herpes simplex

virus has been well documented by various researchers. In-silico studies suggest that
quercetin blocks the binding of SARS-CoV-2 with 3CL and ACE2 receptors and hence

prevents viral entry into the host (Gu et al., 2021). Quercetin is reported as a potent inhibitor

of protease 3CL (SARS-CoV-2 main protease) (Gu et al., 2021). It is also shown to inhibit
the replication of SARS‐CoV‐2 (Luo et al., 2020). Apart from direct inhibition of the virus

life cycle, quercetin is known to decrease the level of C-reactive proteins (CRP), thus it can

be used to control the inflammatory response vis-s-vis to manage the COVID-19. The
promising results of Quercetin treatments on COVID-19 patients are also reported recently

(Luo et al., 2020).
Similarly, the therapeutic potential of curcumin is also being investigated. Its antiviral,

antibacterial, antifungal, and anti-parasitic actions against Togaviridae, Flaviviridae,
Hepadnaviridae, Retroviridae, Papillomaviridae, and Pneumoviridae viruses are widely

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