Volume 29January–March 2025 2025GMSdata at a glance(Jan-Mar) GMS: Cambodia, Lao People's Democratic Republic, Myanmar, Thailand,Viet Nam, Yunnan (China) 18 302cases 1 256 553tests conducted 7%tests decreasecompared tothe same periodin 2024 39%cases decreasecompared to thesame period in2024 24% 41% P. falciparum+mixed casesdecrease comparedto the same periodin 2024 P. vivaxcasesdecreasecompared to thesame period in2024 2025 Quarter 1 overview In Jan-Mar 2025, Greater Mekong subregion (GMS) countries reported18 302malaria cases. CambodiaCambodia reported 8 cases, a 95% decrease MyanmarMyanmar reported 16 730 cases.P. falciparum compared to the same time period in 2024.P.falciparum+ mixed cases,P. vivaxand otherspecies constituted 13%, 87% and 0% of cases,respectively. + mixed cases,P. vivaxand other speciesconstituted 17%, 83% and 0% of cases,respectively. It should be noted that only partialdata is available for Myanmar during thisperiod. China (Yunnan Province)Yunnan reported 88 cases. Among those, no ThailandThailand reported 1417 cases, a 39% decrease indigenous cases were reported.P. falciparum+mixed cases,P. vivaxand other speciesconstituted 2%, 97% and 1% of cases,respectively. compared to the same time period in 2024.P.falciparum+ mixed cases,P. vivaxand otherspecies constituted 6%, 93% and 1% of cases,respectively. Lao People's Democratic RepublicLao People's Democratic Republic reported 37 cases, a 34% decrease compared to the same timeperiod in 2024.P. falciparum+ mixed cases,P.vivaxand other species constituted 5%, 95% and0% of cases, respectively. Viet NamViet Nam reported 22 cases, a 78% decrease compared to the same time period in 2024.P.falciparum+ mixed cases,P. vivaxand otherspecies (reported asP. malariae) constituted68%, 0% and 32% of cases, respectively. Changes in P. falciparum + mixed cases in the GMSfrom Jan-Mar 2024 compared to Jan-Mar 2025 Changes in P. vivax cases in the GMSfrom Jan-Mar 2024 compared to Jan-Mar 2025 Change in number of cases represented in cascading Regional map of P. falciparum + mixed cases by district(Jan-Mar 2025)* Subnational administrative boundaries for Lao People's Democratic Republic,Myanmar, Thailand and Viet Nam:https://data.humdata.org/.Licensed under theCC BY 4.0international licence. WHO has adapted the maps by colouring theshapefiles to show country data. Subnational administrative boundaries for Cambodia: Department of planning and healthinformation of the Ministry of Health. Regional map of P. vivax cases by district(Jan-Mar 2025)* Subnational administrative boundaries for Lao People's Democratic Republic,Myanmar, Thailand and Viet Nam:https://data.humdata.org/.Licensed under theCC BY 4.0international licence. WHO has adapted the maps by colouring theshapefiles to show country data. Subnational administrative boundaries for Cambodia: Department of planning and healthinformation of the Ministry of Health. Number of P. falciparum + mixed casesby month and country* (2023–2025) Number of P. vivax cases by monthby country* (2023–2025) Notes TheMekongMalariaElimination(MME)programmeisaninitiativeaimedatsupportingthecountriesintheGreaterMekongsubregiontowardsthegoalofmalariaeliminationby2030.TheWorldHealthOrganization(WHO)hascompileddataforthispublicationbasedonreportsfromthecountriesintheGreaterMekongsubregion. Datasources:Reportedcasesincludecasesreportedfromallsourcesofpublichealthfacilities,communityhealthworkersandtheprivatesector. Mapsources:TheshapefilesusedforcreatingthemapsareprovidedbyOCHAundertheCCBY4.0licence.WHOhasadaptedthemapsbycolouringtheshapefilestoshowcountrydata.MapsforCambodiaareusedwithpermissionoftheDepartmentofplanningandhealthinformationoftheMinistryofHealth.Theboundaries,namesshown,andthedesignationsusedonthismapdonotimplytheexpressionofanyopinionwhatsoeveronthepartoftheWorldHealthOrganizationconcerningthelegal status of any country,territory,city or area or of its authorities,or concerning thedelimitationofitsfrontiersorboundaries.Dottedanddashedlinesonmapsrepresentapproximateborderlinesforwhichtheremaynotyetbefullagreement. ©WorldHealthOrganization2025.Somerightsreserved.ThisworkisavailableundertheCCBY-NC-SA3.0IGOlicence. Suggestedcitation.Mekong Malaria Elimination Programme epidemiology summary,volume 29,January-March2025.Geneva:WorldHealthOrganization;2025.https://doi.org/10.2471/B09450.