Building the Future of Biodefense

Biothreat intelligence to deter and detect natural, accidental, deliberate and novel biological agents.

ADVISORY
Peru records over 8,600 dengue cases so far this year as rain and heat fuels mosquito spread
03/12/2026
Peru

Recommendation: Dengue is endemic in Peru, and the peak season occurs between November and May. Organizations should reduce mosquito populations at their facilities by eliminating standing water. Employees can prevent mosquito bites by wearing protective clothing, using insect repellent, and eliminating standing water near their homes.

Situation: Peru reported 8,629 cases and 23 deaths so far in 2026, as of week 9. Cases were recorded in 20 of 25 departments, with incidence highest in Ucayali, San Martín, Tumbes, and Loreto. According to media sources, the onset of El Niño Costero in March, expected to last until November 2026, has created climate conditions of intense rainfall and sustained high temperatures that favor the proliferation of the Aedes aegypti mosquito, which transmits dengue and other vector-borne diseases. Experts warned that extreme heat has accelerated the mosquito’s life cycle, reducing development from egg to adult from 10-11 days to 5 days, and that the mosquito species is now appearing at higher altitudes and in contaminated water sources, which was uncommon in previous years. In response, Peruvian health officials implemented a national plan that includes releasing mosquitoes carrying the Wolbachia bacteria, which reduces the insects' ability to transmit the disease to humans, and expanding their vaccination programs. [Confidence: Very High]

WATCH
Health officials confirm 2 measles cases in Sydney with multiple exposure sites
03/12/2026
Australia, New South Wales

Recommendation: Organizations in New South Wales, Australia, should inform employees about the possible measles exposures and should provide flexible work schedules to support employees making vaccine appointments for themselves or family members. Measles is highly contagious and can quickly spread among unvaccinated individuals in a work environment.

Situation: Health officials confirmed 2 new measles cases in Sydney, Australia. One case was locally acquired, while the second had no known exposure, suggesting ongoing undetected community transmission. The public may have been exposed at The Piazza Residential complex 1 in Wentworth Point (3/4-10), JB & Sons Restaurant in Manly (3/8), ​Henry G’s Wine Parlour in Manly (3/8), ​Donny's Bar in Manly (3/8), The Village Inn in Paddington (3/7), Summer Dance Festival, Liberty Hall Courts in Moore Park (3/7), Wentworth Point Pierside Shopping Centre (3/6), Sydney Bus - Manly Wharf to The Northern Beaches Hospital (3/5), ​Felons Brewing Co. in Manly (3/5), ​​The Fresh Fruit Team - Flemington Sydney Markets in Homebush West (3/4-5), and at multiple health care facilities which can be found at the source link. Exposed individuals should monitor for measles symptoms (7-21 days from exposure). [Confidence: Very High]

ADVISORY
New York City detects avian influenza in 2 live bird markets in a week
03/11/2026
New York, Kings CountyNew York, Queens County

Recommendation: Potential cancellation of poultry sales in live bird markets due to avian influenza has limited organizational impacts outside of agricultural and food-related businesses. No human cases have been detected, but additional infections in poultry create opportunities for the public to be exposed to the virus. Organizations that are sensitive to the price of poultry should assume a readiness posture to respond quickly if needed; PHC will update as appropriate.

Situation: HPAI was detected in 3 live bird markets in New York City in March, including 2 in the past week. 2 of the markets were in Kings County, and the other market was in Queens County. 7 HPAI detections in live bird markets were reported in New York so far this year, all in 3 counties of New York City. [Confidence: Very High]

ADVISORY
Ontario reports its 1st ever detections of mpox clade 1b, imported from abroad
03/11/2026
Canada, Ontario

Recommendation: Employers can support employees in obtaining mpox vaccinations by providing flexible work schedules. Information on the availability of mpox vaccines and treatment can also be included in employee wellness communication.

Situation: Health officials confirmed the first 2 imported mpox clade 1b cases in Ontario this week. The 2 cases were detected in Toronto, which previously only reported cases of mpox clade 2b. Clade 1, including clade 1b, has primarily been detected in large-scale outbreaks in Central and East Africa, as well as in several European countries recently (see PHC alerts on 2/23). The US also reported local community transmission of mpox clade 1, but did not specify if the cases were clade 1b or 1a (see PHC alert on 10/20). [Confidence: Very High]

WATCH
Hawaii issues an emergency proclamation ahead of a severe storm system expected this week
03/10/2026
United States of America, Hawaii

Recommendation: Heavy rainfall and flooding can disturb bacteria in soil and contaminate water, increasing the risk of diseases. Organizations in Hawaii with employees affected by flooding may wish to include health and safety-related information in their communications. This should cover adhering to local health guidance, wearing personal protective equipment, protecting open wounds, ensuring access to clean water, and warning about flood hazards, including mold and cuts from submerged metal.

Situation: Hawaii issued an emergency proclamation ahead of a severe storm system expected this week. A "Kona" low weather system is expected to bring heavy rainfall, flooding, strong to severe thunderstorms, and high winds starting as soon as midweek and continuing through the weekend. A statewide flood watch was issued by the National Weather Service on Tuesday, with variations in the flood watch start time by island. Media sources reported that the amount of rain could range from around 10 inches to 30-plus inches, with rainfall rates potentially exceeding 2-3 inches per hour. The storm is expected to hit Kaua'i and O'ahu first before moving to the rest of the state. Based on some forecasting models, the high-end potential of the storm is significantly outside of the realm of "normal" wet season weather. [Confidence: Very High]

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