Johns Hopkins Bloomberg School Of Public Health

This study tested a mobile app that helps small corner stores in low-income Baltimore neighborhoods order and sell more healthy foods like fruits and vegetables. About 310 stores and customers took part. The goal was to see if the app could make healthier options more available a…

This study tested whether a special disinfectant wipe for therapy dogs could reduce the spread of dangerous germs like MRSA to children during hospital visits. 45 children aged 3-17 took part. The goal was to keep animal therapy programs safe without losing their health benefits.

This study tested a peer education program where people already on methadone (a medication for opioid addiction) were trained to talk to friends in their social network who inject drugs, some of whom have HIV. The goal was to help more people get into drug treatment and HIV care.…

This study tested a program that offers drug-checking services and HIV prevention medication (PrEP) to people who use drugs in Baltimore. The goal was to reduce both overdose risk and new HIV infections. About 493 participants joined, and researchers tracked whether they started …

This study tested a program called Family Connections for HIV-positive youth ages 15-21 and their caregivers in Zambia. The goal was to help teens achieve an undetectable viral load and reduce self-stigma through family support and education. Over 1,300 participants took part in …

This study tested two nurse-led programs to help women living with HIV in Durban, South Africa, stay in treatment and keep the virus under control. Over 1,300 women who sell sex for money or goods took part. The goal was to see which program worked best for keeping them in care a…

This study tested whether using special antibiotic ointment and antiseptic soap can reduce the amount of Staph bacteria living on the skin of adults at high risk for infection. Seventy-eight Native American adults with diabetes, obesity, or a recent Staph infection took part. Hal…

This study tested whether giving pregnant women a fortified energy and protein supplement (BEP) improves birth weight and reduces problems like low birth weight and preterm birth. Over 3,300 women in Bangladesh were randomly assigned to receive either the BEP supplement or a stan…

This study looked at whether giving cash to families in food-insecure parts of Somalia could prevent malnutrition in young children and their mothers. Over 3,300 children and mothers took part, and researchers measured their health over six months. The goal was to see if extra ca…

This study looked at how to prevent injuries in children under 7 by making homes safer. Researchers worked with 300 low-income families in Baltimore to find and fix hazards like unlocked poisons, missing smoke alarms, and fall risks. The goal was to see what changes work best and…

This study tested an online program called Help Wanted, designed for men who are sexually attracted to children but have never acted on it. The goal was to give them skills and resources to keep children safe and improve their own well-being. Participants completed surveys and ga…

This study tested different support strategies to help women at high risk for HIV stay on their daily prevention medication (PrEP). Over 300 female sex workers and young women in South Africa were randomly assigned to receive combinations of case management, food vouchers, peer s…

This study in Nigeria looked at whether offering a package of health services for teens—like counseling, vision checks, and deworming—alongside the HPV vaccine could get more 9-year-old girls vaccinated. Over 12,600 people took part, and researchers compared areas with the extra …

This study tested a toolkit designed to help African American women at risk for HIV get PrEP, a daily pill that prevents HIV. The toolkit was used in two clinics in Mississippi and also addressed intimate partner violence, which can make it harder for women to focus on HIV preven…

This study tested whether using adult day services (like daycare for adults) can lower stress in Black caregivers of family members with dementia. Researchers measured stress through surveys and saliva samples from 42 caregivers. The goal was to see if regular use of these servic…

This study tested whether adding environmental harm labels to fast-food menus influences how healthy the meals people choose are. Over 7,000 US adults completed an online survey where they ordered meals from mock burger and sandwich restaurant menus with different label designs. …

This study tested whether adding climate-impact labels (like carbon footprint info) to a fast-food online menu influences how healthy the meals people pick are. Over 6,600 adults in the U.S. completed a mock burger-ordering task. The goal was to see if these labels could guide be…

This study looked at which combination of support programs works best to reduce suicidal thoughts and build strength in American Indian youth ages 10-29 who are at risk for suicide. Researchers tested three programs: New Hope, Elders Resilience, and Case Management, alone or in d…

This study looked at how people understand different food labels that show how sustainable or environmentally harmful a menu item is. Over 14,000 adults in the U.S. were shown a fast-food menu with one of seven label designs and asked about their reactions and buying intentions. …

This study tested whether involving family and friends in counseling sessions helps people in Tanzania stay on methadone treatment for opioid use disorder and take their HIV medications as prescribed. Researchers adapted a UK program to include social support networks. The pilot …

This study tested two approaches to help White Mountain Apache women get recommended mammograms. One group received a culturally tailored education module, and the other got that plus a personal health coach from the community. The goal was to see which method worked better at ge…

This study looked at over 3,300 households in Ethiopia to see which combination of food and nutrition programs works best. Families received different types of support, like savings groups, nutrition classes, or farming help. Researchers measured changes in food security, diet qu…

This study tested a program called Asdzáán Be'eená (Female Pathways) for Navajo girls ages 10-14 and their female caregivers. The goal was to see if the program improves communication, monitoring, and teens' plans to delay sex and avoid substance use. About 408 pairs took part, a…

This study tested a program called the Bullying Classroom Check-Up (BCCU) to help 3rd-5th grade teachers in diverse urban schools better detect and handle bullying. Researchers worked with 34 teachers to see if coaching improved how teachers prevent bullying and how safe students…

This study looked at how over 14,000 adults in the U.S. understand and react to different label designs for ultra-processed foods on a fast-food menu. Participants saw one of sixteen label styles and answered questions about their understanding, perceived effectiveness, and wheth…

This study tested whether using health records to identify and contact people with HIV who had missed appointments could help them return to care. Researchers worked with 160 adults in Ukraine who were out of care. The goal was to see if this data-to-care approach improved clinic…

This study tested a web-based app called myPlanKenya that helps women in Nairobi who are at risk for intimate partner violence. Researchers enrolled 440 women and measured changes in their safety, resilience, and ability to make decisions. The goal was to see if using the app hel…

This study tested how different marketing features of tobacco-free oral nicotine pouches influence what people think about them. Over 5,000 smokers and non-users in the US answered survey questions about how harmful, addictive, or appealing they found the products. The goal was t…

This study looked at data from nearly 10,000 people to find out which depression medications (duloxetine or vortioxetine) work best for different types of patients. Researchers combined information from clinical trials and electronic health records. The goal was to improve person…