M
- MAC (Mycobacterium avium Complex)
- Machine Safety
- Madagascar
- Mad Cow Disease (BSE) — see Bovine Spongiform Encephalopathy
- Magnetic Fields — see Electric and Magnetic Fields
- MAHC — see Model Aquatic Health Code
- Malaria
- Malawi
- Mali
- Mammograms
- see also Breast Cancer
- Manganese
- Manual for the Surveillance of Vaccine-Preventable Diseases
- Marburg Hemorrhagic Fever
- Marijuana [Cannabis sativa or cannabis ]
- Marine Toxins
- Marriage Certificates — see Vital Records
- Marriage Data
- Maternal & Child Health
- Mayaro Virus Infection
- MD (Muscular Dystrophy)
- MDR TB (Multidrug-Resistant TB)
- ME/CFS (Myalgic Encephalomyelitis/ Chronic Fatigue Syndrome)
- Meaningful Use
- Measles
- Measles, Mumps, Rubella, Varicella (MMRV) Vaccine Safety
- Measles Vaccination
- Medical Students, Epidemiology Elective Program for — see Epidemiology Elective Program for Senior Medical and Veterinary Students
- Medication and Pregnancy — see Treating for Two
- Medication Safety
- Melioidosis [Burkholderia pseudomallei Infection]
- Meningitis
- Meningococcal Disease
- Meningococcal Vaccination
- Mental Health
- Mental Health and Disasters
- Mental Health and Genetics
- see also Genetics and Genomics
- see also Mental Health
- Men Who Have Sex With Men (MSM), Health of — see Gay Men's Health
- Mercury
- Mercury and Vaccines — see Thimerosal (Mercury) and Vaccines
- MERS-CoV (Middle East Respiratory Syndrome Coronavirus)
- Mesothelioma
- Metalworking Fluids
- Methicillin Resistant Staphylococcus aureus — see MRSA
- Methyl Alcohol
- Methylene chloride
- Methyl Ethyl Ketone
- Mexico
- Mexico—United States Public Health — see United States—Mexico Public Health
- Microalgal Bloom-associated Illness — see Harmful Algal Bloom (HAB)-Associated Illness
- Microalgal Bloom-Associated Illness (HAB)
- MicrobeNet
- Microcephaly
- see also Zika Virus Infection
- see also Zika Virus Infection and Pregnancy
- Micronutrient Malnutrition
- Microsporidia Infection
- Microwave Radiation — see Electric and Magnetic Fields
- Middle East Respiratory Syndrome Coronavirus (MERS-CoV)
- see also Coronavirus (CoV)
- Migrant, Refugee, and Immigrant Health — see Immigrant, Refugee, and Migrant Health
- Milk, Raw — see Raw Milk
- Million Hearts®
- Mining
- Minority Health
- Minority Health and Health Equity, CDC Office of
- Mission and Vision, CDC — see CDC Mission and Vision
- MMR Vaccination
- MMRV Vaccine and Febrile Seizures — see Febrile Seizures and MMRV Vaccine
- MMWR (Morbidity & Mortality Weekly Report)
- MMWR Summaries
- Mobile
- Model Aquatic Health Code (MAHC)
- Modern Initiative
- Mold
- Molluscum Contagiosum
- Monitoring Developmental Disabilities
- Monkey B virus — see B virus Infection
- Monkeypox
- Mononucleosis, Infectious — see Epstein-Barr Virus Infection
- Monosodium Glutamate (MSG) — see Vaccine Ingredients
- Morbidity & Mortality Weekly Report (MMWR)
- Mortality Data
- see also Death, Leading Causes of Death in Males
- see also Life Expectancy
- Mosquitoes
- Mother to Child HIV Transmission, Global Prevention — see Prevention of Mother to Child HIV Transmission Globally
- Motor Vehicle Injuries
- Mouse and Rat Control — see Rodents, Diseases from
- Mozambique
- MRSA [Methicillin Resistant Staphylococcus aureus]
- MSG (Monosodium Glutamate)
- Mucormycosis
- Mucus — see Cold, Common
- Multidrug-Resistant TB (MDR TB)
- Multiple organ dysfunction syndrome — see Sepsis
- Multiple Vaccines and the Immune System — see Immune System and Multiple Vaccines
- Multistate Foodborne Outbreaks
- Mumps
- Mumps Vaccination
- Murine (Flea-borne) Typhus — see Typhus Fevers
- Muscular Dystrophy (MD)
- Musculoskeletal Disorders — see Ergonomic and Musculoskeletal Disorders
- Museum, CDC
- Mustard Gas (H, HD, and HT) [Sulfur Mustard]
- Myalgic Encephalomyelitis/ Chronic Fatigue Syndrome (ME/CFS)
- Mycobacterium abscessus Infection
- Mycobacterium avium Complex (MAC)
- Mycobacterium tuberculosis Infection — see Tuberculosis
- Mycoplasma pneumoniae Infection
- Mycotic diseases — see Fungal diseases
- Myelomeningocele — see Spina Bifida
- Myiasis