Tonga: Dengue Fever Outbreak - Feb 2025

The Ministry of Health declared an outbreak of Dengue Fever (DF) for Tonga on 19 February 2025. [...] 42 new cases reported with positive rapid test and that brings up the total cases of DF to 52. Majority of confirmed cases from Vava’u (25), the rest from Tongatapu (17) and ‘Eua (10). Age group mostly affected is 10-19 years old. 10 cases are hospitalized, 2 in Vaiola Hospital and 8 in Prince Ngu Hospital. 3 of these cases are diagnosed with dengue hemorrhagic fever (DHF). No death reported so far. (Govt. of Tonga, 21 Feb 2025)

As of today, 4 new cases reported with positive rapid test, that brings up the total DF cases to 73. Majority of confirmed cases from Tongatapu (33), the rest from Vava’u (28) and ‘Eua (12). Age group mostly affected is 10-19 years old. A total of 5 cases are currently hospitalized (4 Vaiola, 1 Niu’eiki), and all are stable. No dengue-related death reported so far. It is now confirmed that Dengue Virus Type 2 is responsible for the current dengue outbreak in Tonga according to the first batch of samples collected from Tongatapu. The result for the 2nd batch which included samples from Vava’u and ‘Eua is expected to be available later this week. Preventative activities to hot spot and high risk areas in collaboration with Tonga Red Cross Society, are ongoing with continuous technical support from WHO, UNICEF and SPC. (Govt. of Tonga, 26 Feb 2025)

As of today, 11 new cases reported with positive rapid test, that brings up the total cumulative DF cases to 99. Majority of confirmed cases from Vava’u (43), the rest from Tongatapu (40) and ‘Eua (16). Age group mostly affected is 10-19 years old. Youngest age affected is 8-months old. A total of 11 cases are currently hospitalized (5 Prince Ngu, 4 Niu’eiki, 2 Vaiola), one still in ICU under close monitoring. No dengue-related death reported so far. (Govt. of Tonga, 3 Mar 2025)

As of today, 20 new cases reported with positive rapid test, that brings up the total cumulative DF cases to 149. Majority of confirmed cases from Vava’u (76), the rest from Tongatapu (52) and ‘Eua (21). Age group mostly affected is 10-19 years old. A total of 9 cases are currently hospitalized (2 Prince Ngu, 3 Niu’eiki, 4 Vaiola), 1 still in ICU, the rest are stable. No dengue-related death reported so far. (Govt. of Tonga, 5 Mar 2025)

As of 12th March, 15 new cases have been reported with positive rapid tests, which brings up the total cumulative cases to 230. The majority of confirmed cases are from Vava’u (120); the rest are from Tongatapu (79) and ‘Eua (31). No dengue-related deaths reported to date. (Govt. of Tonga, 12 Mar 2025)

As of 13th March, 23 new cases have been reported with positive rapid tests, which brings up the total cumulative DF cases to 253. The majority of confirmed cases are from Vava’u (140), the rest are from Tongatapu (81) and ‘Eua (32). No dengue-related deaths have been reported to date. (Govt. of Tonga, 13 Mar 2025)

As of today, 8 new cases reported with positive rapid test, which brings up the total cumulative DF cases to 292. Majority of confirmed cases from Vava’u (164), the rest from Tongatapu (93) and ‘Eua (35). A total of 6 cases are currently hospitalized (3 Prince Ngu, 2 Niu’eiki, 1 Vaiola). All in stable condition. No dengue-related death reported to date. (Govt. of Tonga, 17 Mar 2025)

As of 19th March, 6 new cases have been reported with positive rapid tests, which brings up the total cumulative DF cases to 308. The majority of confirmed cases are from Vava’u (170). The rest are from Tongatapu (100) and ‘Eua (38). A total of 12 cases are currently hospitalized (6 Prince Ngu, 4 Niu’eiki, 2 Vaiola). All are in stable condition. No dengue-related deaths have been reported to date. (Govt. of Tonga, 19 Mar 2025)

As of 25 March 2025, the Ministry of Health reported nine new dengue cases in the past 24 hours, bringing the total confirmed cases to 348 since the declaration of the Outbreak on 19 February 2025, primarily affecting 10-19-year-olds. Four patients are currently hospitalised, all reported to be in stable condition, with no death reported so far. (SPC, 25 Mar 2025)

As of 4 April 2025, 4 new cases have been reported with positive rapid tests, which brings up the total cumulative DF cases to 423. The majority of confirmed cases are from Vava’u (234). The rest are from Tongatapu (140) and ‘Eua (49). A total of 9 cases are currently hospitalized (4 in Prince Ngu, 1 in Niuéiki, 4 in Vaiola). All are in stable condition. No dengue-related deaths have been reported to date. (Govt. of Tonga, 4 Apr 2025)

As of 14 April 2025, the Ministry of Health reported seven new dengue cases in the past 24 hours, bringing the total confirmed cases to 492 since the declaration of the Outbreak on 19 February 2025, primarily affecting 10-19-year-olds. Six patients are currently hospitalised, all reported to be in stable condition, with no death reported so far. (Govt. of Tonga, 14 Apr 2025)

As of 21 April 2025, the Ministry of Health reported five new dengue cases in the past 24 hours, bringing the total confirmed cases to 540 since the declaration of the Outbreak on 19 February 2025, primarily affecting 10-19-year-olds. Nine patients are currently hospitalised, all reported to be in stable condition, with no death reported so far. (Govt. of Tonga, 22 Apr 2025)

As of 28 April 2025, the Ministry of Health reported six new dengue cases, bringing the total confirmed cases to 588 since the declaration of the Outbreak on 19 February 2025, primarily affecting 10-19-year-olds. Two dengue-related deaths have been reported to date and eight patients are currently hospitalised and in stable condition. (Govt. of Tonga, 29 Apr 2025)

As of 5 May 2025, the Ministry of Health reported twenty-two new dengue cases, bringing the total confirmed cases to 647 [...]. Three dengue-related deaths have been reported to date and six patients are currently hospitalised and in stable condition. (Govt. of Tonga, 6 May 2025)