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As warm weather approaches New York City (NYC) and classes conclude for the summer, millions of people are beginning to enjoy outdoor activities.
However, the NYC Health Department issued Advisory #13 on June 6, 2025, concerning the health risks associated with tick-borne diseases (TBDs).

Once thought to be on the decline, the mosquito that transmits the yellow fever virus has been infecting more people than usual in the Region of the Americas.
Initially detected in the 17th century, the increase in the number of cases in 2025 from the previous year reflects, in part, a periodic reactivation of sylvatic transmission cycles in the Amazon basin.

Years before the multi-country mpox outbreak began in May 2022, two African countries, Nigeria and Cameroon, reported their first cases in decades.
There are two types of the mpox virus, clade I and clade II, currently infecting people.
The ongoing global outbreak of clade II mpox has resulted in more than 100,000 cases in 122 countries, including 115 countries where mpox was not previously reported.

Considering the significant risk chikungunya poses to all individuals living in or traveling to endemic areas in 2025, authorizing a preventive vaccine for children has become essential as international tourism rebounds.
Currently, there are two chikungunya vaccines available in the United States; however, neither is approved for use in children.

Due to the ongoing decline in pertussis vaccination coverage and the current resurgence of pertussis (whooping cough) cases in the Americas Region, the Pan American Health Organization/World Health Organization (PAHO/WHO) urges Member States to enhance their epidemiological surveillance systems and vaccination rates.
In the Americas, 2012 saw the highest number of cases in the decade, with 72,328 reported cases of pertussis. As of now, there is a provisional total of 43,751 cases for the year 2024.