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Pediatric Influenza and Vaccination

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As school starts up again, it is inevitable that kids will pass around lots of viruses, including influenza. Influenza (often called “the flu”) is a very contagious respiratory virus which causes fever up to 103-105 degrees, muscle aches, runny nose, and sore throat. A dry cough which can become severe is common, and fatigue is often extreme.  Nausea, vomiting, and diarrhea may also occur.

Influenza is passed from one person to another by sneezing, coughing, touching objects that are contaminated like countertops, and sharing cups or silverware.  The time between being exposed and getting sick with influenza is 1-4 days, so it moves quickly through a community. Influenza symptoms usually last 7-10 days in kids, though the cough and tiredness can take longer to resolve. Influenza activity peaks between December and February but may start earlier in the fall.

Though influenza may feel just like a severe cold, for many it can be very dangerous, especially older adults and young children. Over 40,000 adults died last year from influenza and its complications. There were 266 reported deaths due to influenza in children this past flu season, a new record high.

Children under age 5 are most at risk of complications, including severe pneumonia caused by bacteria. Kids can also develop bronchiolitis (swelling and inflammation of the small airways) and croup due to influenza. 

Decreased appetite and fluid intake along with vomiting and diarrhea can cause dehydration, signs of which include decreased urination, dry mouth, and sunken appearing eyes. Neurologic complications may include brain inflammation and seizures. A rare complication called Guillain-Barre Syndrome causes progressive and severe weakness, resulting in respiratory distress that can be life-threatening.

Annual influenza vaccination (of you, other family members, and your child) is your best bet to protect your kiddo. All children over age 6 months (with rare exceptions) should get vaccinated ideally before Halloween. The vaccine effect lasts about 6 months and protects up to 60% of those vaccinated from becoming infected. Although not totally protective against getting influenza, the vaccine is very effective at decreasing the severity of infection, with lower rates of hospitalization and complications including pneumonia. Flu vaccine can be given with other childhood vaccinations.

You cannot get influenza from flu vaccine, but mild side effects like a runny nose and low-grade fever can occur; these are due to the appropriate response of your immune system to the vaccine. Influenza vaccines have been well studied and are extremely safe.  In the past some have been concerned about thimerosal, a vaccine preservative, because it contains ethyl mercury. Ethyl mercury is entirely different from methylmercury, which can be harmful in high levels. Ethyl mercury poses no risk, but to minimize concern, thimerosal was removed from most childhood vaccines in 2001. It is present now only in multi-dose flu vaccine vials, which are not commonly used.

Along with influenza vaccination, don’t forget other simple ways to avoid illness during flu season such as good handwashing and avoiding sharing water bottles, drinks, or food. Influenza home care includes encouraging adequate fluids and fluid-containing foods like soup, Jello, or popsicles. Acetaminophen (Tylenol) and ibuprofen (Advil, Motrin) can help with fever and discomfort; be sure to follow age and weight guidelines.

Call your provider if your child has influenza symptoms and has difficulty breathing, appears dehydrated, or has fever for more than 3 days. You should also reach out to your provider if your child has extreme fatigue or irritability, or is under 3 months old with a fever of 100.4 or higher. 

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Dr. Elise Herman

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Dr. Herman is passionate about community health outreach, school programs, and child/family health and wellness. She has more than 31 years of experience as a pediatrician in Ellensburg, Washington, the last 3 with KVH Pediatrics. In 2022 Dr. Herman mostly retired from practice and continues to contribute blog posts and remain a visible advocate for kids in the community.

Measles in Children

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The rise in measles cases recently has many people, parents included, very concerned, and with good reason. Measles is a viral illness that can be very dangerous especially for infants, children under age 5 years, pregnant women, and those with immune system problems. As of 2/26/25, there have been 165 cases in 10 states, including Washington, and sadly one child has died. Although the number of infected people does not sound very high, measles is one of the most infectious viruses known, so numbers are likely to grow. Measles infects 90% of those exposed if they are not vaccinated.

Measles starts with a fever (as high as 104), runny nose, cough, and red watery eyes. These symptoms usually start 7-14 days after exposure though it can take as long as 21 days to show signs. Two- three days later, small white spots inside the cheeks (Koplik spots) may show up. The typical measles rash starts on the face at the hairline about 3-5 days after symptoms begin. This rash consists of red, usually flat, spots that spread head to toe and may join together. Fever may spike to 104 when the rash appears. Diarrhea can also occur.

Complications are common with measles, especially in infants, children under age 5 years, pregnant women, adults over age 20 and those who have immune system deficits. Ear infections occur in 1 out of 10 kids with measles and pneumonia happens in 5% of all people infected. Brain inflammation (encephalitis) afflicts 1 out of 1,000 infected children and can cause brain damage, deafness, seizures, and death.  Nearly 3 in 1,000 kids with measles die, most commonly due to pneumonia or encephalitis. Pregnant women are at increased risk of delivering early and having a low-birth-weight baby.

There is a very rare complication that can occur 7-10 years after measles infection called Subacute Sclerosing Panencephalitis (SSPE). It is a brain disorder related to the earlier measles for which there is no treatment and results in death within 3 years of diagnosis without exception.

The good news is that the measles vaccine (either as MMR [measles, mumps, and rubella vaccines] or MMRV (as above plus varicella [chickenpox] vaccine) is safe and effective. For kids it is a 2-dose series, given at ages 12-15 months and 4-6 years; adults who are unvaccinated may only need one dose. One dose of a measles vaccine is 93% effective at preventing infection, and 2 doses gives 97% protection. Common side effects include muscle soreness at the injection site, low grade fever, and a mild rash. Rarely there can be a brief harmless seizure due to fever, occurring in less than 8 kids per 10,000 vaccinated.

The Health and Human Services Secretary Robert F. Kennedy, Jr, issued a statement on March 3, 2025, with the subheading “MMR vaccine is crucial to avoiding potentially deadly disease” and then noted “Vaccines not only protect individual children from measles, but also contribute to community immunity, protecting those who are unable to be vaccinated due to medical reasons.”

Earlier concerns about MMR vaccine and autism have been strongly disproved in multiple studies. The doctor who made those claims was found to have fabricated his ‘results’ and lost his medical license. Autism is often diagnosed at around the same age as when kids receive MMR vaccine, but the vaccine does not cause autism.

During a local measles outbreak, students who are unvaccinated are excluded from school for 21 days from the last measles rash identified in the community. If they are given the first dose of the MMR or MMRV series, they may return to school. If an unvaccinated child is exposed to measles, they should be immunized as soon as possible to decrease the risk of infection.

If you have questions about measles vaccination, contact your child’s health care provider. Measles is a very dangerous virus that is unfortunately also extremely contagious. Our best way of protecting our kids and our community is vaccination.

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Dr. Elise Herman

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Dr. Herman is passionate about community health outreach, school programs, and child/family health and wellness. She has more than 31 years of experience as a pediatrician in Ellensburg, Washington, the last 3 with KVH Pediatrics. In 2022 Dr. Herman mostly retired from practice and continues to contribute blog posts and remain a visible advocate for kids in the community.

Preventing Respiratory Syncytial Virus Infections

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Contributor Dr. Elise Herman

As the winter weather approaches, so does the ‘sick season’, including illness due to RSV (Respiratory Syncytial Virus). RSV typically starts in fall, peaks in winter, and causes cold symptoms including runny nose, cough, and fever in children and adults. Most kids have had RSV by age 2. Although usually mild, RSV can cause more serious problems like wheezing, pneumonia, and trouble breathing. These problems are more likely in premature babies or in kids with heart disease, lung issues like asthma, and immune system problems. Between 58,000 and 80,000 kids under age 5 are hospitalized due to RSV each year. Adults aged 60 and above are also at higher risk of more severe RSV illness. Reinfections with RSV are common.

Like other colds viruses, RSV spreads by the droplets released by coughing or sneezing. You can also get it by direct contact (for example kissing) or touching a contaminated surface like a counter or cup and then touching your eyes, nose, or mouth.

There is no effective treatment for RSV and since it is a virus, antibiotics do not help. There are, however, two new good ways to prevent RSV—vaccines for adults and antibody treatment for young children. Vaccines stimulate the formation of antibodies to help fight infection (active immunity). Antibody treatments give antibodies directly to the body (passive immunity).

RSV vaccines are available for those 32-36 weeks pregnant during RSV season and if given at least 2 weeks before delivery, will help protect the baby from severe RSV. RSV vaccine is also recommended for those 60 years and older.

Antibody therapy (Nirsevimab) is approved for babies less than 8 months during RSV season (if mom did not get vaccine at least 2 weeks before delivery). Nirsevimab is also appropriate for some infants aged 8-19 months with severe health issues including extreme prematurity, immune system problems, cystic fibrosis, and heart disease. Nirsevimab is an injection and lasts 5 months, so helps protect for the entire RSV season. There is another antibody treatment called Palivizumab that has been used for years, but this is only approved for very high-risk children under age 2 and requires a monthly injection.

Side effects of Nirsevimab are uncommon and include temporary discomfort, redness or mild swelling at the injection site, and a rash. Nirsevimab can be given with routine childhood vaccines and may be given if a child has mild cold symptoms. Children who have had RSV should still receive the antibody therapy due to the risk of getting infected again later in the sick season.

There may be some difficulty having enough Nirsevimab for all kids who are eligible this year; contact your child’s provider about this. Supplies of RSV vaccine for those who are pregnant or 60 and over seem adequate; check with your provider or local pharmacy.

Remember the routine ways we can all help prevent the spread of RSV and other viruses, such as frequent hand-washing, avoiding touching one’s face, staying home if sick, and wearing a mask when appropriate. Also, cover sneezes and coughs, do not share cups or utensils, and keep countertops and other frequently touched surfaces clean. Don’t forget your child’s other important vaccines including Influenza and COVID vaccines as these are also important to help keep your child healthy this winter season.

more about The contributor

Dr. Elise Herman

Blog Posts
Profile

Dr. Herman is passionate about community health outreach, school programs, and child/family health and wellness. She has more than 31 years of experience as a pediatrician in Ellensburg, Washington, the last 3 with KVH Pediatrics. In 2022 Dr. Herman mostly retired from practice and continues to contribute blog posts and remain a visible advocate for kids in the community.