Yemen is free of COVID-19

Weber ND, Andersen DO, North JA, Murray BK, Lawson LD, et al. In vitro virucidal effects of Allium sativum (garlic) extract and compounds. Planta Med. 1992; 58: 417-423. PubMed: https://www.ncbi.nlm.nih.gov/pubmed/1470664

Mehrbod P, Amini E, Tavassoti-Kheiri M. Antiviral Activity of Garlic Extract on Influenza Virus. Iranian J Virol. 2009; 3: 19-23.

Leyla B, Peir H, Ali G. Garlic: a review of potential therapeutic effects. Avicenna J Phytomed. 2014; 4: 1–14. PubMed: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4103721/

Abiy E, Berhe A. Anti-Bacterial Effect of Garlic (Allium sativum) against Clinical Isolates of Staphylococcus aureus and Escherichia coli from Patients Attending Hawassa Referral Hospital, Ethiopia. J Infec Dis Treat. 2016; 2: 2.

Yen T, Linda LC, Larry ED, Steven JL, Victoria S, Gaynor C. Antiviral Properties of Garlic: In vitro Effects on Influenza B, Herpes Simplex and Coxsackie Viruses. Planta Medica. 1985, 460-461. PubMed: https://www.ncbi.nlm.nih.gov/pubmed/17342616

Masomeh L, Narges M, Hassan R, Hadi A. Peppermint and its functionally. A Review. Arch Clin Microbiol. 2017; 8: 54.

Jin Z, Ke-Ping Y, Jin-Xuan C. Antimicrobiolal activity and mechanism of action of black pepper esstiontial oil on meat-borne E.coli. Front Microbiol. 2016; 7: 2094. PubMed: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5209337/

Koshak A, Wei L, Koshak E, Wali S, Alamoudi O, et al. Nigella sativa Supplementation Improves Asthma Control and Biomarkers: A Randomized, Double-Blind, Placebo-Controlled Trial. Phytother Res. 2017; 31: 403-409. PubMed: https://www.ncbi.nlm.nih.gov/pubmed/28093815

Kheirouri S, Hadi V, Alizadeh M. Immunomodulatory Effect of Nigella sativa Oil on T Lymphocytes in Patients with Rheumatoid Arthritis. Immunol Invest. 2016; 45: 271-283. PubMed: https://www.ncbi.nlm.nih.gov/pubmed/27100726

Nazir S, Arif Zaidi SM, Zaidi Z. Kalonji Seeds (Nigella sativa) in strengthening the Immune system. Madridge J Case Rep Stud. 2018; 2: 55-56.

Yun-Hsiang C, Kuang-Lun W, and Chia-Hsiang C.Methamphetamine Reduces Human Influenza A Virus Replication. PLoS One. 2012; 7(11): e48335. PubMed: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3491060/

Hamid E, Jaber S, Mahmoud M. El. Antimicrobial and Cytotoxic Activity of the Extracts of Khat Callus Cultures.Reprinted from: Perspectives on new crops and new uses. 1999. J. Janick (ed.), ASHS Press, Alexandria, VA.

Shadon P, Shellard EJ. An anatomical study of Ethiopian khat (leaf of Catha edulis Forssk.) J Pharm Pharmacol. 1972; 14: 110–118. PubMed: https://www.ncbi.nlm.nih.gov/pubmed/13911098

Kalix P. Pharmacological properties of the stimulant khat. Pharmacol. Ther. 1990; 48: 397–416. PubMed: https://www.ncbi.nlm.nih.gov/pubmed/1982180

Calil IP, Fontes EPB Plant immunity against viruses: antiviral immune receptors in focus. Annals of Botany. 2017; 119: 711–723. PubMed: https://www.ncbi.nlm.nih.gov/pubmed/27780814

Shunhei Y, Tomokazu M, Kazuyoshi K et al. Effect of nicotine on innate antiviral pathways and HCV replication. Conference Reports for NATP. San Diego CA, May 17-22, 2008.

Furusawa E, Ramanathan S, Suzuki N, Tani S, Furusawa S. Antiviral Activity of Tobacco Smoke Condensate on Encephalomyocarditis Infection in Mice. Antimicrob Agents Chemother. 1973; 3: 484–487. PubMed: https://www.ncbi.nlm.nih.gov/pubmed/4364177

Haiyan W, Mouming Zhao B, Yueming J, Guoha R . Identification of polyphenols in tobacco leaf and their antioxidant and antimicrobial activities. Food Chemistry. 2008; 107; 4: 1399-1406.

Yan N, Du Y, Liu X, Zhang H, Liu Y, et al. A Review on Bioactivities of Tobacco Cembranoid Diterpenes. Biomolecules. 2019; 9. PubMed: https://www.ncbi.nlm.nih.gov/pubmed/30654586

Primo V, Rovera M, Zanon S, Oliva M, Demo M, et al. Determination of the antibacterial and antiviral activity of the essential oil from Minthostachysverticillata (Griseb.) Epling. Rev Argent Microbiol. 2001; 33: 113-117.

Taylor DJR, Hamid SM, Andres AM, Saadaeijahromi H, Piplani H, et al. Antiviral Effects of Menthol on Coxsackievirus B. Viruses. 2020; 12. pii: E373. PubMed: https://www.ncbi.nlm.nih.gov/pubmed/32231022