Yucatán HIV Cases Rise 10%, Now 3rd in Mexico

Mérida, Mexico — Yucatán concluded the second half of 2025 with the third-highest rate of newly diagnosed cases of the Human Immunodeficiency Virus (HIV) in the nation: 12.44 new cases per 100,000 inhabitants. This represents an 8.1% increase compared to the rate of 11.50 recorded during the same period in 2024, when the state held the fourth national position, according to a report from the National Epidemiological Surveillance System (Sinave).

In its report for the second half of 2025, published on September 18, Sinave specifies that among the 32 states of Mexico, the five leaders in new HIV cases are as follows:

1. Quintana Roo, with a rate of 32.50 new diagnosed HIV cases per 100,000 inhabitants from January to July 2025.
2. Colima, with 12.81.
3. Yucatán, with 12.53.
4. Baja California Sur, with 12.44.
5. Tabasco, with 10.47.

One year prior, in the second half of 2024, the leaders in new HIV cases were:

1. Quintana Roo, with 30.02 new cases per 100,000 inhabitants.
2. Colima, with 12.38.
3. Campeche, with 11.64.
4. Yucatán, with 11.50.
5. Baja California, with 10.31.

10% Rise in Number of New Cases

From January 1 to July 14, 2025, Sinave details, 298 cases of HIV were diagnosed in Yucatán. This is a 10% increase in relation to the 271 cases notified in the same timeframe of 2024, representing 27 additional new cases.

Yucatecans with HIV

In the first half of this year, the new HIV patients consist of 265 men and 33 women. In the first half of 2024, the figures were 239 and 32, respectively, Sinave contrasts.

Furthermore, Sinave breaks down that of the 298 Yucatecan patients, 148 are in the first clinical stage of HIV, which is an acute or primary infection; 55 are in the second stage, a chronic infection; 73 are in the third stage, which is AIDS; and 22 are in the fourth and final stage, the most severe stage of opportunistic infections.

Yucatán Ranks 11th in Mexico by Case Volume

By the number of new HIV cases, 298, Yucatán occupies the eleventh national position, the same rank it held one year ago.

In 2025, Yucatán is positioned after the State of Mexico, with 1,223 new cases; Veracruz, with 910; Mexico City, with 634; Quintana Roo, with 620 (compared to 562 in the first half of 2024); Jalisco, with 502; Baja California, with 399; Chihuahua, with 370; Guanajuato, with 334; Oaxaca, with 325; and Michoacán, with 323.

Campeche is the seventh state with the fewest HIV cases, 109, after Puebla, with only one new case; Tlaxcala, with 33; Zacatecas, with 55; Aguascalientes, with 60; Durango, with 84; and Colima, with 108. One year ago, Campeche had accumulated 124 HIV cases.

HIV in the Region and the Country

According to the official figures, in the first half of 2025, 1,029 people in the Yucatán Peninsula received an HIV diagnosis. This is 72 more peninsula residents than the 957 diagnosed in the same period of 2024, representing a 7.5% increase of HIV in the region over one year.

While HIV is on the rise in Yucatán, it is declining nationally, Sinave contrasts. In 2025, as of July 14, 9,046 people had tested positive for HIV in the country, a drop of 4.8% compared to the 9,502 recorded in the same span of 2024.