Tamarind seeds has antiviral properties and can potentially be used to develop antiviral medication for chikungunya, according to a research by Indian Institute of Technology-Roorkee.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/tamarind-seeds-can-cure-chikungunya-iit-r-study
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/deccan-herald-bangalore
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/indian-institute-technology-iit
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/medical-research
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/chikungunya
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/tamarind