Argentina is experiencing a continued rise in chikungunya cases, with 268 new infections reported as of Tuesday, April 21, 2026. According to the National Epidemiological Bulletin (BEN) for epidemiological week 14 of 2026, the total number of confirmed and probable cases has reached 837.
Of these cases, 746 are locally acquired, while 91 involve individuals with recent travel history to countries including Bolivia, Brazil, Paraguay, and Cuba. Health officials noted that the increase in transmissions has been evident since the beginning of the year.
The outbreak remains heavily concentrated in the northwestern region of the country, where 93% of all cases—amounting to 782 infections—have been recorded. Salta province accounts for the highest burden with 494 confirmed and probable cases, followed by Tucumán with 144 and Jujuy with 80.
Additional cases have been identified in other provinces: Santiago del Estero reports 47 infections, Catamarca 17, and Buenos Aires province 28. Córdoba has documented 14 cases, while the City of Buenos Aires (CABA) has seven. Entre Ríos and San Luis each report two cases, and Santa Fe and Chaco each have one.
In response to the ongoing situation, Argentina’s Ministry of Health has intensified surveillance of Acute Undifferentiated Febrile Syndrome (SUFI) to monitor shifts in viral transmission patterns and strengthen the national public health response.
The sustained spread of chikungunya underscores the importance of vector control measures and early case detection, particularly in regions bordering neighboring countries where cross-border transmission risks remain elevated.
