The country has not reported any case of mother-to-child transmission of HIV since 2017 and its congenital syphilis cases has consistently been two per 100 000 live births, much less than fifty per 100 000 live births needed for elimination certification, as per the findings of the Global Validation Advisory Committee.
Read the WHO statement here: https://www.who.int/southeastasia/news/detail/10-12-2019-who-congratulates-sri-lanka-for-eliminating-mother-to-child-transmission-of-hiv-syphilis