Tag Archive for: allergic reaction

girl getting a vaccine

Second dose of Pfizer COVID-19 vaccine safe for children with allergic reaction to first dose

girl getting a vaccineA new study published in The Journal of Allergy and Clinical Immunology: In Practice found that pediatric patients who experienced an adverse reaction to the first dose of the Pfizer-BioNTech COVID-19 vaccine or with suspected polyethylene glycol or polysorbate allergies can safely receive the second dose in a supervised setting. Until now, previous studies demonstrating second dose safety after a reaction to the first dose have only included adult patients.

“These results reaffirm similar studies performed in adults and provide additional assurance specific to the pediatric population,” says Joel Brooks, D.O., M.P.H., allergist and immunologist at Children’s National Hospital and corresponding author of the study. “We found that most of these initial reactions are not supportive of an IgE-mediated mechanism.”

The researchers evaluated 13 children referred to a specialized vaccine clinic for suspected immediate allergic reactions to the first dose of the Pfizer-BioNTech COVID-19 vaccine from May 2021 to February 2022. Nine of the 13 children were evaluated after experiencing an allergic reaction following the first dose. All nine successfully received the second dose with no or minimal symptoms.

The other four children were evaluated after clinical histories of PEG/polysorbate allergy. Three of the four received both Pfizer vaccine doses with no symptoms. The fourth patient elected to receive the Janssen COVID-19 vaccine.

“It is important that children 6 months and older receive two doses of the COVID-19 vaccine for full protection from severe illness and hospitalization due to COVID-19 infection,” adds Dr. Brooks. “Children with potential anaphylaxis should undergo careful evaluation to weigh the benefits and risks of the second dose.”

You can read the full study, “Safety outcomes of SARS-CoV-2 vaccination in pediatric patients with a first dose reaction history or allergy to polyethylene glycol or polysorbate,” here.

Epinephrine auto-injector for allergy

Assessing daily food allergy self-management among adolescents

Epinephrine auto-injector for allergy

Adolescents reported that epinephrine auto-injectors were frequently available, but least likely to be present outside of the home or school.

Severe food allergic reactions can be life-threatening or fatal and are experienced by up to 40% of children with food allergies, with adolescents at greatest risk. To assess early adolescents’ food allergy self-management, Linda Herbert, Ph.D., and her colleagues at Children’s National Hospital, had 101 adolescents ages 10-14 years complete the Food Allergy Management 24-Hour Recall as an interview.

Adolescents reported that epinephrine auto-injectors were frequently available, but least likely to be present outside of the home or school. Adolescents also relied on past experience with food to determine safety, which is not a recommended strategy. Appropriate assessment of food safety and problem-solving involving how to keep epinephrine auto-injectors with adolescents outside the home should be primary intervention targets.

Study authors from Children’s National include: Linda Herbert, Ph.D., Ashley Ramos, Ph.D., Frances Cooke, Kaushalendra Amatya, Ph.D., and Hemant Sharma, M.D., M.H.S.

Read the full study in the Annals of Allergy, Asthma, and Immunology.

toddler nursing

Newborns with suspected food allergies breastfed significantly longer

toddler nursing

Mothers whose newborns had suspected food allergies reported breastfeeding them significantly longer than women whose infants had no adverse reactions after food exposure, according to preliminary research led by Karen A. Robbins, M.D., and presented during the American Academy of Allergy, Asthma & Immunology 2019 Annual Meeting.

According to the Centers for Disease Control and Prevention (CDC), food allergies affect 4 to 6 percent of U.S. children, making such allergies a growing public health concern. Researchers are attempting to learn more about the interplay between food allergies and what, when and how children eat to inform allergy-prevention efforts. Little is known about the association between perceived food allergies, intolerance or hypersensitivity among babies eating their first bites of solid food and how long they’re breastfed.

Dr. Robbins and colleagues analyzed data gathered through a longitudinal study led by the Food and Drug Administration (FDA) and the CDC from 2005 to 2007. The Infant Feeding Practices Study II tracked diet and feeding practices of about 2,000 women late in their pregnancies and followed their babies’ diets through the first year of life.

Some 2,586 breastfeeding mothers in the study completed surveys when their infants were 4, 9 and 12 months old. The women were asked whether there were problems caused by food, such as an allergic reaction, sensitivity or intolerance. The majority of these infants (84.6 percent) had no suspected allergic reaction to either food they ate on their own or to food they were exposed to via breastmilk. The mothers reported that nearly 11 percent of infants reacted to something they ate; 2.4 percent reacted to food products they were exposed to via breastmilk; and 2.4 percent reacted to both food they consumed directly or were exposed to via breastfeeding. They also found:

  • Infants with suspected food allergies after exposure to food their mothers ate were breastfed a mean of 45.8 weeks.
  • Infants with food intolerance after both exposure to food their mother consumed and food they ate themselves were breastfed a mean of 40.2 weeks.

That contrasts with infants with no concern for food reactions, who were breastfed a mean of 32 weeks.

“Breastfeeding a newborn for the first few months of life helps their developing immune system become more robust, may affect the microbiome, and could influence or prevent development of allergy later in life,” says Dr. Robbins, an allergist at Children’s National Health System and lead author of the research. “However, mothers’ perceptions of their newborns’ adverse reactions to food appears to factor into how long they breastfeed.”

One potential concern is that extended breastfeeding can impact solid food introduction practices.

“Gradually transitioning to solid food gives infants an opportunity to sample an array of foods, nibble by nibble, including food allergens like peanut and eggs. We know from previously published research that introducing high-risk babies to a food allergen like peanuts early in life appropriately primes their immune system and dramatically decreases how often these children actually develop peanut allergies,” Dr. Robbins adds. “The relationship between breastfeeding and allergy development is complex, so understanding mothers’ practices is important. We also do not know how often these early reactions result in true food allergy, compared with transient food intolerance.”

American Academy of Allergy, Asthma & Immunology 2019 Annual Meeting presentation

  • “Perceived food allergy, sensitivity or intolerance and its impact on breastfeeding practices.”

Monday, Feb. 25, 2019, 9:45-10:45 a.m. (PST)

Karen A. Robbins M.D., lead author; Marni Jacobs, Ph.D., co-author; Ashley Ramos Ph.D., co-author; Daniel V. DiGiacomo, M.D., co-author; Katherine M. Balas BS, co-author; and Linda Herbert, Ph.D., director of Children’s Division of Allergy and Immunology’s psychosocial clinical program and senior author.