The Influenza A(H5N1) virus currently circulating in the Americas is the product of a recombination that occurred in wild birds in Europe and low pathogenic strains in wild and domestic birds during its global dissemination. This new genotype has spread rapidly from Europe to North America, Africa and Western Asia through the migratory routes of waterfowl. After the detection of the influenza A (H5N1) virus in the Americas in 2021, it has been detected throughout the entire continent. Six human infections caused by avian influenza A(H5N1) have been recorded since 2022 in the Americas. Four were notified in the USA, on April 29, 2022, April 1, 2024, May 22, 2024 and May 30, 2024; one in Ecuador, notified on January 9, 2023; and one in Chile, notified on March 29, 2023.

Some international destinations have circulating poliovirus (shown in map). Before any international travel, make sure you are up to date on your polio vaccines. Before travel to any destination shown in the map, adults who previously completed the full, routine polio vaccine series may receive a single, lifetime booster dose of polio vaccine.

Dengue continues to be the arbovirus with the highest number of cases reported in the Region of the Americas, with outbreaks that occur cyclically every 3 to 5 years. 2023 is the year with the highest historical record of dengue cases, exceeding 4.1 million new infections. This figure exceeded those of 2019, the year in which they registered more than 3.1 million cases, including 28,203 serious cases and 1,823 deaths. Circulation of DENV-3 was identified, which had not circulated for several years in some areas.

Today, the U.S. Food and Drug Administration approved Ixchiq, the first chikungunya vaccine. Ixchiq is approved for individuals 18 years of age and older who are at increased risk of exposure to chikungunya virus. Ixchiq is administered as a single dose by injection into the muscle. It contains a live, weakened version of the chikungunya virus and may cause symptoms in the vaccine recipient similar to those experienced by people who have chikungunya disease. The safety of Ixchiq was evaluated in two clinical studies conducted in North America in which about 3,500 participants 18 years of age and older received a dose of the vaccine with one study including about 1,000 participants who received a placebo. The most commonly reported side effects by vaccine recipients were headache, fatigue, muscle pain, joint pain, fever, nausea and tenderness at the injection site.

Cases are registered in Panama, Brazil, Italy, Burkina Faso and India (Haryana)

Some international destinations have circulating poliovirus. Before any international travel, make sure you are up to date on your polio vaccines.

Some international destinations have circulating poliovirus (shown in map). Before any international travel, make sure you are up to date on your polio vaccines. Before travel to any destination shown in the map, adults who previously completed the full, routine polio vaccine series may receive a single, lifetime booster dose of polio vaccine.

As the summer 2023 travel season begins, the CDC reminds clinicians and public health officials to provide guidance for measles prevention to international travelers and to be on alert for measles cases. Measles is highly contagious; one person infected by measles can contaminate about 90% of their unvaccinated close contacts. India, Pakistan, England, Jordan, Turkey, Mauritania, Ecuador and the US have reported cases in the past months.

Many international destinations are reporting increased numbers of cases of measles. Travelers are at risk of measles if they have not been fully vaccinated two weeks prior to departure or have not had measles in the past and travel internationally to areas where measles is spreading.

Many international destinations are reporting increased numbers of cases of measles. Travelers are at risk of measles if they have not been fully vaccinated two weeks prior to departure or have not had measles in the past and travel internationally to areas where measles is spreading.

Some international destinations have circulating poliovirus. Before any international travel, make sure you are up to date on your polio vaccines.

AFGHANISTAN, SERBIA (SMEDEREVO), INDIA, DEMOCRATIC REPUBLIC OF CONGO

Some international destinations have circulating poliovirus, such as DR Congo and USA (environmental samples). Before any international travel, make sure you are up to date on your polio vaccines.

In 2022 over 29 countries have reported cholera cases or outbreaks. As of 30 November 2022, 16 of these have been reporting protracted outbreaks. Many of those countries reported higher case numbers and case fatality ratio than in previous years.

Some international destinations have circulating poliovirus. Before any international travel, make sure you are up to date on your polio vaccines.

Estados Unidos