Building the Future of Biodefense

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

ADVISORY
Legionnaires' cases reach 12 in Sydney, including 1 death; the source remains unknown
04/18/2025
Australia, New South Wales

Recommendation: Legionnaires’ disease spreads through inhaling aerosolized contaminated water from sources like cooling towers, pools/hot tubs, showers, or fountains. Employees working in or visiting Sydney, Australia should seek medical attention if symptoms appear. Organizations that own or manage buildings in Sydney with cooling towers should stay up to date ...

Situation: New South Wales issued an updated health alert for Legionnaires’ disease (see PHC alert 4/11). Cases of Legionnaires’ disease increased from 5 to 12 confirmed cases in people who spent time in Sydney’s central business distr...

WATCH
Measles cases grow to 433 in Chihuahua, Mexico, vaccination efforts intensify
04/18/2025
Mexico, Estado de Chihuahua

Recommendation: Organizations in Mexico 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 reported 433 measles cases as of 4/18 in Chihuahua, Mexico, with 47% of the infections concentrated in Cuauhtémoc. 1 death was recorded (see PHC alert 4/14). Health officials intensified vaccination efforts in af...

WATCH
Michigan announces a measles outbreak in Montcalm County
04/18/2025
Michigan, Montcalm County

Recommendation: Organizations in Montcalm County, Michigan 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: Michigan health officials announced a measles outbreak in Montcalm County, the state's 1st since 2019. They did not specify the number of cases in the outbreak, but reported that an outbreak is 3 or more cases, and that the state'...

ADVISORY
Bogota, Colombia reports elevated whooping cough activity
04/18/2025
Colombia, Distrito Capital de Bogota

Recommendation: Whooping cough (also known as pertussis) is highly contagious; a single case in the workplace can infect 15 others. The average worker absenteeism for whooping cough is 6 days. Organizations in Bogota, Colombia should provide flexible work schedules to support employees making vaccine appointments for themselves or family members....

Situation: Bogota's Health Secretary published a social media post urging the public to vaccinate children under the age of 5 and pregnant women (starting from week 20) against whooping cough. Bogota reported 107 confirmed and 390 probable w...

ADVISORY
Samoa declares a dengue outbreak
04/17/2025
Samoa

Recommendation: Samoa frequently reports cases of dengue-like illness. Dengue is likely underreported, though there was a widespread outbreak in the country from 2023-24. Organizations in Samoa should reduce mosquito habitats by eliminating sources of standing water and applying insecticides to outdoor water storage containers. Employees can reduce infection risk ...

Situation: Samoa's Ministry of Health declared a dengue outbreak this week after a surge in suspected and confirmed cases in the past 2 weeks, particularly in Upolu. 15 confirmed cases were reported since the start of the year, of which 9 we...

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