Free guide · Scarlet Beast En español →
RSV: the signs in babies and adults, when to call, care at home, and the shots that protect
For anyone with a baby, a child or an older adult who has a cold that might be RSV (respiratory syncytial virus). CDC says RSV usually causes mild, cold-like symptoms that go away on their own in a week or two, that nearly all children get it before their second birthday, and that babies and older adults can get very sick. This page passes on, by name, what seven CDC RSV pages say: the signs in very young babies, when CDC says to call, who is at highest risk, easing the symptoms at home, how long it spreads, and the shots that protect babies and older adults. It builds the words to say to a doctor’s office, a pharmacist or a daycare, and prints a card of the dates to keep.
A word with a dotted line under it, like this, opens its official definition, quoted from a U.S. government glossary.
Right now
- A baby stops breathing or turns blue, or someone cannot breathe or cannot be woken: call 911 now (that line is ours).
- A child having difficulty breathing, not drinking enough fluids, or getting worse? CDC says get medical care.
- A baby younger than 6 months who is fussy, less active, eating less, or has pauses in breathing? CDC says those can be the only signs of RSV in a very young baby, and many babies with RSV have no fever.
- An adult with difficulty breathing, trouble eating or drinking, chest pain or pressure, sudden dizziness or confusion, or getting worse? CDC says call your provider.
More help
- A child who is sick: Coughs and colds in a baby or child · Fever in a baby or child · Whooping cough · All our pages on a baby’s or child’s health.
- Flu season: Flu: the signs and the flu vaccine · COVID-19: the emergency signs, testing and treatment. Pregnant: Pregnant, or with a new baby.
- Lung or heart disease: Living with COPD · Heart failure. No insurance: When you need a doctor and can’t pay.
- All our free tools.
Looking after a baby or child? The pages on this site for a baby or child, on one list.
This page and its wording were written with AI (Claude) for Scarlet Beast (our AI policy). No doctor or nurse has reviewed it. The facts were read on October 14, 2026 on seven CDC RSV pages on cdc.gov: About RSV, Symptoms and Care of RSV, How RSV Spreads, RSV in Infants and Young Children and RSV in Adults (each updated or reviewed between December 2025 and February 2026), Immunizations to Protect Infants (updated August 18, 2025) and Vaccines for Adults (updated February 20, 2026). Ours: the 911 line (CDC says to call a provider or get medical care, and gives no 911 rule for RSV), keeping a sick person’s kisses away from a baby’s face, asking a health department about cost, and the order of the steps. What we left out: the names of the vaccines and antibodies, cold medicines and home remedies, case counts, CDC’s pages for clinicians, and two numbers on which CDC’s English and Spanish pages disagree. This page saves nothing and loads no trackers.