"Is pneumonia contagious?" is the respiratory health question Americans type into Google most, drawing an estimated 137,000 searches a month, according to a September 22 analysis by health care staffing firm Soliant Health reported by Becker's Hospital Review. "Is bronchitis contagious?" and "What is RSV?" followed.
The list arrives as the 2026-27 respiratory season begins. In its September 18 update, the CDC said reports of group A strep were beginning to rise as children returned to school, and agency modeling estimated that COVID-19 infections were growing or likely growing in 27 states. Earlier in September, the CDC reported that rhinovirus and enterovirus infections were also increasing nationally, while flu and RSV activity remained low.
The numbers measure curiosity, not illness. Search volume shows what people are unsure about. It does not indicate how many people are sick or where infections are spreading.
Search Data Reveal Lasting Confusion About Contagion
Soliant analyzed about 30,000 question-based searches in September using data from the search optimization platform Ahrefs, excluding branded queries, entertainment searches, and near-duplicates. Together, the top 15 questions draw more than 731,000 estimated searches a month.
Most of the top 15 fall into three groups: whether an illness is contagious, what an illness is or how long it lasts, and what counts as a fever. Two ask how to soothe a sore throat, and one asks how to reduce a baby's fever naturally, with about 24,000 estimated monthly searches.
One notable absence is COVID-19. No COVID question made the list, even as CDC modeling shows infections growing in many states. The strep question, "What does strep throat look like?", lines up more closely with current trends, since group A strep infections are increasing.
The list also shows how people phrase worry. Questions such as "What kills a sore throat fast?" and "Why does my body ache and I feel tired with no fever?" reflect a search for quick relief, the kind of question a pharmacist or clinician can often answer in minutes.
Federal Answers to the Top Questions
Pneumonia. Whether pneumonia spreads depends on its cause. Pneumonia caused by viruses or bacteria can be passed on because those germs spread from person to person, according to the American Lung Association. Flu, for example, can spread and then lead to pneumonia in some people. Walking pneumonia, often caused by Mycoplasma bacteria, is contagious as well.
Bronchitis. Acute bronchitis is usually triggered by the same viruses that cause colds and flu. The inflammation itself is not what spreads; the virus behind it is. Chronic bronchitis, a long-term lung condition, is not contagious.
RSV. People with RSV are usually contagious for three to eight days and may spread it a day or two before symptoms start, the CDC says. Some infants and people with weakened immune systems can spread it for four weeks or longer.
Fever. A child has a fever at 100.4°F or higher measured rectally, or 99.5°F or higher measured by mouth, according to the National Library of Medicine's MedlinePlus. For adults, a fever generally means a temperature above 99°F to 99.5°F by mouth, depending on the time of day.
Flu. Most people with flu recover in a few days to less than two weeks, but some develop complications such as pneumonia, according to the CDC's flu guidance.
Strep throat. Strep is a bacterial infection that needs a test to diagnose, because a sore throat alone cannot confirm it. The CDC's strep throat page explains the testing and treatment process.
Warning Signs That Outrank a Search Bar
Home care works for many mild illnesses, but some symptoms need prompt medical attention. Trouble breathing, bluish lips or skin, chest pain or pressure, confusion, trouble waking, and signs of dehydration call for urgent care or 911, not another search.
For babies, parents should be especially careful with the "reduce fever naturally" approach that many people search for. Pediatric guidance generally treats any fever in an infant younger than 3 months as a reason to call a doctor right away. Older children who have a fever along with a rash, trouble breathing, or unusual sleepiness also need prompt evaluation.
People at higher risk from respiratory viruses include adults 65 and older, young children, pregnant people, and those with chronic heart or lung disease, diabetes, or weakened immune systems. For them, early testing can matter, because antiviral treatments for flu and COVID-19 work best when started soon after symptoms begin.
Getting Ahead of Virus Season
Last season is a useful reminder. The 2025-26 flu season was moderately severe, with a preliminary peak hospitalization rate of 21.1 per 100,000 people, and this season's flu vaccines were updated to include the H3N2 subclade K strain that dominated last winter, according to Becker's.
Practical steps are simple. Ask a clinician or pharmacist which vaccines are recommended for your age and health, stay home when sick, and wash your hands often. Check the CDC's respiratory illness data pages for activity in your state. Families caring for older relatives can also confirm whether they are due for recommended vaccines before holiday gatherings.
AI chatbots are another growing source of health answers. About 34% of Americans use them for health information, according to a Pew Research Center survey cited by Becker's. Like search results, chatbot answers can be incomplete, so they work best as a starting point for questions to bring to a clinician.
The top searches show real uncertainty about contagion and fever. The most reliable answers come from federal health agencies and your own care team, especially when symptoms are severe, worsening, or affecting a baby or an older relative.
Key Questions Answered
What is the most-Googled respiratory health question? "Is pneumonia contagious?" with about 137,000 estimated monthly U.S. searches, according to Soliant Health's analysis.
Is pneumonia contagious? It depends on the cause. Pneumonia caused by viruses or bacteria can spread because those germs pass from person to person.
How long is RSV contagious? Usually three to eight days, according to the CDC, though some infants and people with weakened immune systems can spread it for four weeks or longer.
What temperature counts as a fever in a child? 100.4°F or higher measured rectally, or 99.5°F or higher measured by mouth.
Do these searches mean more people are sick? No. Search volume reflects what people want to know, not infection rates.
What respiratory illnesses are rising now? In mid-September, the CDC reported rising group A strep and estimated COVID-19 infections were growing in 27 states, while flu and RSV activity remained low.
When should I seek urgent care? For trouble breathing, chest pain, confusion, bluish skin, dehydration, or any fever in a baby younger than 3 months.
Published by Medicaldaily.com
