- Acute Flaccid Myelitis
- Alzheimer’s Disease
- Arteriovenous Malformations
- Attention Deficit Hyperactivity Disorder
- Back Pain
- Brain Aneurysm
- Brain Tumors
- Carpal Tunnel Syndrome
- Childhood Brain Tumors
- Delirium
- Dementia
- Hemorrhagic Stroke
- Ischemic Stroke
- Memory
- Meningitis
- Mild Cognitive Impairment
- Movement Disorders
- Multiple Sclerosis
- Neuroblastoma
- Neuromuscular Disorders
- Parkinson’s Disease
- Polio and Post-Polio Syndrome
- Speech and Language Problems in Children
- Stroke
- Transient Ischemic Attack
- Tremor
- Walking Problems
- West Nile Virus
- A1C
- Blood Glucose
- Diabetes
- Diabetes and Pregnancy
- Diabetes Complications
- Diabetes in Children and Teens
- Diabetes Medicines
- Diabetes Type 1
- Diabetes Type 2
- Diabetic Diet
- Diabetic Eye Problems
- Diabetic Foot
- Diabetic Heart Disease
- Diabetic Kidney Problems
- Diabetic Nerve Problems
- How to Prevent Diabetes
- Hyperglycemia
- Metabolic Syndrome
- Prediabetes
- Abortion
- Breast Cancer
- Breast Diseases
- Breast Reconstruction
- Breastfeeding
- Cervical Cancer
- Cervical Cancer Screening
- Cesarean Delivery
- Childbirth
- Ectopic Pregnancy
- Endometriosis
- Female Infertility
- Health Problems in Pregnancy
- High Blood Pressure in Pregnancy
- HIV and Pregnancy
- Hormone Replacement Therapy
- HPV
- Hysterectomy
- Infections and Pregnancy
- Mammography
- Mastectomy
- Menopause
- Menstruation
- Miscarriage
- Ovarian Cancer
- Ovarian Cysts
- Ovarian Disorders
- Pelvic Floor Disorders
- Pelvic Inflammatory Disease
- Pelvic Pain
- Period Pain
- Polycystic Ovary Syndrome
- Pregnancy
- Pregnancy and Drug Use
- Pregnancy and Opioids
- Premenstrual Syndrome
- Prenatal Care
- Prenatal Testing
- Primary Ovarian Insufficiency
- Sexual Problems in Women
- Stillbirth
- Teenage Pregnancy
- Trichomoniasis
- Tubal Ligation
- Uterine Cancer
- Uterine Diseases
- Uterine Fibroids
- Vaginal Bleeding
- Vaginal Cancer
- Vaginal Diseases
- Vaginitis
- Vulvar Cancer
- Vulvar Disorders
- Yeast Infections
- Alcohol
- Calcium
- Child Nutrition
- Cholesterol
- Cholesterol Levels: What You Need to Know
- Cholesterol Medicines
- DASH Eating Plan
- Eating Disorders
- Food Allergy
- HDL: The “Good” Cholesterol
- High Cholesterol in Children and Teens
- How to Lower Cholesterol
- How to Lower Cholesterol with Diet
- Infant and Newborn Nutrition
- LDL: The “Bad” Cholesterol
- Malabsorption Syndromes
- Nutrition for Older Adults
- Pregnancy and Nutrition
- Toddler Nutrition
- Triglycerides
- VLDL Cholesterol
- Alpha-1 Antitrypsin Deficiency
- Ataxia Telangiectasia
- Brain Malformations
- Cerebral Palsy
- Charcot-Marie-Tooth Disease
- Chiari Malformation
- Cleft Lip and Palate
- Color Blindness
- Congenital Heart Defects
- Craniofacial Abnormalities
- Cystic Fibrosis
- Ehlers-Danlos Syndrome
- Fetal Alcohol Spectrum Disorders
- Friedreich Ataxia
- Genetic Counseling
- Hemophilia
- Huntington’s Disease
- Hydrocephalus
- Muscular Dystrophy
- Neural Tube Defects
- Neurofibromatosis
- Newborn Screening
- Osteogenesis Imperfecta
- Prader-Willi Syndrome
- Pregnancy and Medicines
- Rett Syndrome
- Sickle Cell Disease
- Spina Bifida
- Spinal Muscular Atrophy
- Tay-Sachs Disease
- Tourette Syndrome
- Tuberous Sclerosis
- Usher Syndrome
- Acute Lymphocytic Leukemia
- Allergy
- Animal Bites
- Ankylosing Spondylitis
- Aplastic Anemia
- Asthma
- Asthma in Children
- Childhood Leukemia
- Childhood Vaccines
- Chronic Lymphocytic Leukemia
- COVID-19 Vaccines
- Cryptosporidiosis
- Eosinophilic Disorders
- Eosinophilic Esophagitis
- Giant Cell Arteritis
- Hay Fever
- HIV
- HIV and Infections
- HIV in Women
- Hodgkin Lymphoma
- Infectious Diseases
- Infectious Mononucleosis
- Juvenile Arthritis
- Kawasaki Disease
- Lymphedema
- Lymphoma
- Multiple Myeloma
- Pemphigus
- Pneumocystis Infections
- Rheumatoid Arthritis
- Scleroderma
- Sjogren’s Syndrome
- Tonsillitis
- Vaccines
- Viral Infections
- Adhesions
- Ankle Injuries and Disorders
- Arm Injuries and Disorders
- Back Injuries
- Brachial Plexus Injuries
- Burns
- Chest Injuries and Disorders
- Concussion
- CPR
- Dislocated Shoulder
- Dislocations
- Elbow Injuries and Disorders
- Eye Injuries
- Facial Injuries and Disorders
- Finger Injuries and Disorders
- Foot Injuries and Disorders
- Fractures
- Hand Injuries and Disorders
- Heel Injuries and Disorders
- Hip Injuries and Disorders
- Inhalation Injuries
- Insect Bites and Stings
- Jaw Injuries and Disorders
- Knee Injuries and Disorders
- Leg Injuries and Disorders
- Mosquito Bites
- Neck Injuries and Disorders
- Rotator Cuff Injuries
- Shoulder Injuries and Disorders
- Spinal Cord Injuries
- Sprains and Strains
- Tick Bites
- Toe Injuries and Disorders
- Traumatic Brain Injury
- Wrist Injuries and Disorders
- Acute Bronchitis
- Bird Flu
- Chronic Bronchitis
- COPD
- COVID-19 (Coronavirus Disease 2019)
- Croup
- E-Cigarettes
- Fistulas
- Flu
- Granulomatosis with Polyangiitis
- H1N1 Flu (Swine Flu)
- Legionnaires’ Disease
- Lung Cancer
- Mesothelioma
- Pneumonia
- Pulmonary Hypertension
- Respiratory Syncytial Virus Infections
- Sleep Apnea
- Smoking
- Tuberculosis
- Whooping Cough
- Anatomy
- Assisted Reproductive Technology
- Birth Control
- Chlamydia Infections
- Circumcision
- Erectile Dysfunction
- Genital Herpes
- Genital Warts
- Gonorrhea
- Herpes Simplex
- Infertility
- Male Infertility
- Penis Disorders
- Prostate Cancer
- Prostate Cancer Screening
- Prostate Diseases
- Reproductive Hazards
- Sexual Health
- Sexual Problems in Men
- Sexually Transmitted Diseases
- Syphilis
- Testicular Cancer
- Testicular Disorders
- Vasectomy
- Abdominal Pain
- Bad Breath
- Bleeding
- Breathing Problems
- Bruises
- Chest Pain
- Choking
- Chronic Pain
- Constipation
- Cough
- Diarrhea
- Dizziness and Vertigo
- Edema
- Fainting
- Fever
- Frostbite
- Gas
- Gastrointestinal Bleeding
- Headache
- Heartburn
- Heat Illness
- Hives
- Hypothermia
- Indigestion
- Itching
- Jaundice
- Nausea and Vomiting
- Pain
- Rare Diseases
- Raynaud’s Disease
- Sciatica
- Speech and Communication Disorders
- Stuttering
COVID-19 (Coronavirus Disease 2019)
Summary
COVID-19 (coronavirus disease 2019) is an illness caused by a virus. This virus is a coronavirus called SARS-CoV-2. It spreads when a person who has the infection breathes out droplets and very small particles that contain the virus. On this page, you’ll find links to resources on important issues such as symptoms, risks, and how you can protect yourself and your family.
We also have pages on:
National Institute of Allergy and Infectious Diseases
NIH MedlinePlus Magazine
- 9 Tips to Address COVID-19 at Work
- Getting an Accurate Read on Pulse Oximeters
- Multisystem Inflammatory Syndrome in Children
- Your COVID-19 Glossary
Related Issues
- Beware of Fraudulent Coronavirus Tests, Vaccines, and Treatments Food and Drug Administration
- Communicating Clearly While Wearing a Face Covering National Institutes of Health
- Coronavirus and Your Health Coverage: Get the Basics Centers for Medicare & Medicaid Services
- COVID-19 and Breastfeeding Centers for Disease Control and Prevention
- COVID-19: Variants of the Virus Centers for Disease Control and Prevention
- COVID-19: What People with Cancer Should Know National Cancer Institute
- Debunking COVID-19 (Coronavirus) Myths Mayo Foundation for Medical Education and Research
- HIV and COVID-19 National Institutes of Health, Office of AIDS Research
- Is It Flu, COVID-19, Allergies, or a Cold? National Institutes of Health
- Multisystem Inflammatory Syndrome in Children (MIS-C) and Adults (MIS-A) Centers for Disease Control and Prevention
- Pulse Oximetry National Library of Medicine
- Q&A for Consumers: Hand Sanitizers and COVID-19 Food and Drug Administration
- Why You Should Not Use Ivermectin to Treat or Prevent COVID-19 Food and Drug Administration
Start Here
- Community Engagement Alliance (CEAL) Against COVID-19 Disparities National Institutes of Health
- Coronavirus Disease 2019 (COVID-19) Centers for Disease Control and Prevention
- NIH COVID-19 Research National Institutes of Health
Encyclopedia
- Coronavirus Medical Encyclopedia
- Coronavirus disease 2019 (COVID-19) Medical Encyclopedia
- COVID-19 symptoms Medical Encyclopedia
- Middle East Respiratory Syndrome (MERS) Medical Encyclopedia
- Severe acute respiratory syndrome (SARS) Medical Encyclopedia
Children
- Coronavirus (COVID-19) (For Parents) Nemours Foundation
- Coronavirus (COVID-19): What Are Variants? (For Parents) Nemours Foundation
- Coronavirus (COVID-19): What to Do If Your Child Is Sick Nemours Foundation
- For Parents: Multisystem Inflammatory Syndrome in Children (MIS-C) Associated with COVID-19 Centers for Disease Control and Prevention
- Is It a Cold, the Flu, or COVID-19? (For Parents) Nemours Foundation
Women
- Coronavirus (COVID-19): Pregnancy FAQs Nemours Foundation
- Pregnant and Recently Pregnant People (COVID-19) Centers for Disease Control and Prevention
Symptoms
- Coronavirus and the Nervous System National Institute of Neurological Disorders and Stroke
- Post-COVID Conditions (Long COVID): MedlinePlus Health Topic National Library of Medicine
- Symptoms of COVID-19 Centers for Disease Control and Prevention
Prevention and Risk Factors
- Coronavirus Clinical Studies COVID-19 Prevention Network
- COVID-19 by County: Know Your COVID-19 Community Level Centers for Disease Control and Prevention
- COVID-19 Vaccines: MedlinePlus Health Topic National Library of Medicine
- COVID-19: How to Protect Yourself & Others Centers for Disease Control and Prevention
- COVID-19: Understanding Risk Centers for Disease Control and Prevention
- How COVID-19 Spreads Centers for Disease Control and Prevention
- Isolation and Precautions for People with COVID-19 Centers for Disease Control and Prevention
- Use and Care of Masks Centers for Disease Control and Prevention
Patient Handouts
- COVID-19 and face masks Medical Encyclopedia
- Home isolation and COVID-19 Medical Encyclopedia
- How to stop the spread of COVID-19 Medical Encyclopedia
- Mild to moderate COVID-19 – discharge Medical Encyclopedia
- Severe COVID-19 – discharge Medical Encyclopedia
- What to do after exposure to COVID-19 Medical Encyclopedia
Statistics and Research
- COVID-19 Disrupts Gut Microbes National Institutes of Health
- Mandatory Masking in Schools Reduced COVID-19 Cases National Institutes of Health
- United States COVID-19 Cases and Deaths by State Centers for Disease Control and Prevention
Older Adults
- COVID-19 Risks and Information for Older Adults Centers for Disease Control and Prevention
Diagnosis and Tests
- COVID-19 Testing: MedlinePlus Health Topic National Library of Medicine
Treatments and Therapies
- COVID-19 Treatments and Medications Centers for Disease Control and Prevention
- Get Medication for COVID-19 (Locator) Administration for Strategic Preparedness and Response
- How Test to Treat Works for Individuals and Families Administration for Strategic Preparedness and Response
- If You Are Sick or Caring for Someone (COVID-19) Centers for Disease Control and Prevention
- Know Your Treatment Options for COVID-19 Food and Drug Administration
- Understanding the Regulatory Terminology of Potential Preventative and Therapeutic Drugs for COVID-19 Food and Drug Administration
Latest News
- End of the Federal COVID-19 Public Health Emergency (PHE) Declaration Centers for Disease Control and Prevention
Find an Expert
- National Institute of Allergy and Infectious Diseases National Institute of Allergy and Infectious Diseases
Journal Articles
Clinical Trials
- Understanding Coronavirus Clinical Studies COVID-19 Prevention Network
Specifics
- What Is COVID-19 Reinfection? Centers for Disease Control and Prevention