Johns Hopkins Bloomberg School Of Public Health

This study looks at whether pregnant women can take calcium and iron-containing multivitamin supplements at the same time without harming their own or their baby's iron levels. Currently, experts recommend taking them at different times because calcium can block iron absorption. …

This study tests a program called Hastiin Bidziil (Strong Man) to help Native American men reduce their use of drugs or alcohol. About 160 men aged 18 and older who live near Fort Defiance or Chinle, Arizona, and have at least moderate substance use risk will take part. The progr…

This study tests a diabetes management program called Together Overcoming Diabetes (TOD), designed specifically for Lakota and other American Indian/Alaska Native communities in South Dakota. The program focuses on improving blood sugar control and addressing unique social and cu…

This study tests a program called Project YES+ for youth aged 15-21 living with HIV in Zambia. It combines peer mentoring with a mental health approach endorsed by the World Health Organization to reduce stigma, violence, and depression. The goal is to help young people stick wit…

This study tests whether giving antibiotics to children with Shigella-related watery diarrhea helps them recover faster and grow better. About 700 children in Bangladesh and Zambia will receive either azithromycin or a placebo. Researchers will track diarrhea duration, germ clear…

This study tests whether giving a whole blood transfusion can help children under 5 years old with severe malaria and very low platelet counts survive. About 132 children will be randomly assigned to receive either standard care plus a transfusion or standard care alone. The main…

This study aims to help people who use drugs stay safe from both HIV and overdose. It offers drug-checking services to understand what's in the drug supply, along with access to PrEP (a daily pill or shot that prevents HIV). The program is led by trained peers and will enroll 500…

This study tests a 7-day program given to cholera patients in the hospital to help stop the disease from spreading to their families. The program teaches handwashing with soap and provides simple tools like soapy water bottles and chlorine tablets. Researchers will see if this ap…

This study aims to see if providing targeted water, sanitation, and hygiene (WASH) support to households of diarrhea patients can reduce the spread of cholera in high-risk areas of the Democratic Republic of the Congo. About 2,900 people will take part, including those who have h…

This study looks at the best way to encourage parents to vaccinate their children against HPV. Researchers will show parents either an informational video, a personal story video, or both, and then track how many teens actually get the vaccine. About 1,100 parents of unvaccinated…

This study tests a program to help Black women in Baltimore start taking PrEP, a medicine that prevents HIV. The program addresses challenges like intimate partner violence and racism that can make it harder to access PrEP. About 300 Black women who are HIV-negative and at risk w…

This study tests if a program called 'Bright Horizons' can help prevent binge drinking and drug use in Native American teens aged 12-17. The program teaches skills like managing emotions, coping with stress, and setting goals. Researchers will track changes in alcohol use over 30…

This study tests a new approach to preventing drug overdoses. People who use opioids will be trained as peer educators to teach their friends and family how to recognize and respond to an overdose. The goal is to see if this training reduces the number of overdoses and stigma in …

This study looks at whether reducing social media use and replacing it with exercise, or practicing mindfulness meditation, can help college students feel less anxious and depressed. Three hundred students who use social media heavily will be split into three groups: one that doe…

This study follows 216 children, teens, and young adults with gastroparesis (slow stomach emptying) or similar symptoms to learn how their condition changes over time. Participants will complete questionnaires about their symptoms and may have stomach emptying tests. The goal is …

This study follows 1,300 children with chronic kidney disease to learn how their condition changes over time and what factors affect their health. Researchers measure kidney function and track when children need treatments like dialysis or a transplant. The goal is to better unde…

This study looks at whether people with gastroparesis (a condition where the stomach empties slowly) have problems with the pyloric sphincter, a muscle that controls food leaving the stomach. Researchers will use special tests to measure how well this muscle works in 150 adults w…

This study is creating a registry of 250 adults with gastroparesis or functional dyspepsia—conditions that cause nausea, vomiting, and stomach pain. Participants will fill out questionnaires, take a nutrient drink test, and have a stomach-emptying scan. The goal is to track sympt…

This study looks at whether a simple guide can improve how family caregivers and home care aides share information when caring for someone with Alzheimer's or related dementia. About 100 family members and aides will use the guide and report back on how helpful it is. The goal is…

This study looks at whether watching personal stories or informational videos—or both—can help more older adults get vaccinated. Researchers will compare three approaches in 6,000 U.S. adults aged 50 and older. The goal is to find the best way to encourage vaccination.

This study is testing a mobile app called SAFPAS to help food pantries in Baltimore give clients healthier food options and be better prepared for emergencies. About 537 food pantry clients and 20 pantries will take part. Researchers will check if the app improves the nutritional…

This study will test a school-based program to help 2,500 high school students in Saudi Arabia build healthier digital habits and reduce problems like social media addiction. Some students will get the standard digital citizenship class, while others will also have a parent progr…