While there is no medicine for COVID-19 as of now, it will be good to take preventive measures which boost our immunity in these times. Ministry of AYUSH recommends self-care guidelines for preventive health measures and boosting immunity with special reference to respiratory health. These are supported by Ayurvedic literature and scientific publications.
Links:
[1] http://admin.indiaenvironmentportal.org.in/reports-documents/ayurveda%E2%80%99s-immunity-boosting-measures-self-care-during-covid-19-crisis-india
[2] http://www.indiaenvironmentportal.org.in/files/file/ImmunityBoostingAYUSHAdvisory.pdf
[3] http://admin.indiaenvironmentportal.org.in/category/publisher/ministry-health-and-family-welfare
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/coronavirus
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/respiratory-diseases
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/india
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health-care
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/ayurveda
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/ministry-health-and-family-welfare