Vaccines Archives

COVID-19 vaccination was effective in children, adolescents during 2021

April 7, 2023

A large study of U.S. children and teens who received the Pfizer/BioNTech COVID-19 vaccine finds that it was effective through much of 2021, but waned over time, especially as the omicron variant became dominant in 2022. Teens who received a booster dose regained some protection.

COVID-19 vaccination of mother during pregnancy protects infant, though protection wanes

February 28, 2023

Being vaccinated against COVID-19 during pregnancy provides protection for the baby through its first several months of life, a Kaiser Permanente analysis finds. Protection was stronger against the delta variant than the more recent omicron variant.

COVID-19 vaccination not tied to postmenopausal bleeding

July 20, 2022

Kaiser Permanente study does not support anecdotal reports that postmenopausal bleeding was common after COVID-19 vaccination.

Messages from doctors increased COVID-19 vaccination among Black, Latino elders

June 17, 2022

Elderly Black and Latino people were more likely to get a COVID-19 vaccination after they received an email or letter from their Kaiser Permanente doctor, new research finds.

COVID-19 patients did better if they had booster vaccination

June 16, 2022

A large Kaiser Permanente analysis of COVID-19 patients confirms the value of vaccination, finding higher rates of hospitalization and advanced medical care for COVID-19 patients who were unvaccinated, were vaccinated but not boosted, or who had an additional health condition such as obesity or heart disease.

Study offers reassurance to pregnant patients using biologic medications for autoimmune disorders

June 9, 2022

A new study led by Kaiser Permanente researchers provides reassurance about vaccinating infants whose mothers took biologic medications for an autoimmune disorder during pregnancy.

Lower in-hospital mortality for vaccinated patients hospitalized with COVID-19

May 9, 2022

COVID-19 patients in Kaiser Permanente Northern California hospitals during the delta surge of 2021 were less likely to die in the hospital of COVID-19 if they were vaccinated, new research finds.

No serious health effects linked to mRNA COVID-19 vaccines

September 3, 2021

Federal and Kaiser Permanente researchers combing the health records of 6.2 million patients found no serious health effects that could be linked to the 2 mRNA COVID-19 vaccines.

COVID-19 vaccine trial enrolls children aged 5-11 at 3 sites in Northern California

June 9, 2021

About 75 children are scheduled to receive their first vaccination against COVID-19 as part of the Pfizer/BioNTech vaccine clinical trial through Kaiser Permanente Northern California.

Kaiser Permanente data key to nation’s COVID-19 vaccine surveillance strategy

January 6, 2021

Kaiser Permanente’s Vaccine Study Center is leading a key part of the national safety surveillance effort for the COVID-19 vaccines, tracking patient data for serious side effects.

It’s flu season: What you need to know about the research

October 9, 2020

What does it take to be sure the annual flu vaccine is effective and safe? Research. In a podcast, Nicola Klein, head of the Vaccine Study Center, tackles some common questions about the vaccine and recent findings.

Study identifies geographic clusters of pregnant women who missed flu shots

September 8, 2020

A Kaiser Permanente analysis of women who did not get flu shots during their pregnancies found the women clustered in geographic “hot spots.” These women tended to have fewer prenatal medical visits and live in low-income neighborhoods.

Kaiser Permanente joins late-stage COVID-19 vaccine study

August 12, 2020

The Division of Research has joined a phase 3 clinical trial testing a Pfizer/BioNTech vaccine against the COVID-19 virus. Kaiser Permanente Southern California and Northwest join them in this global effort.

Study finds no evidence of harm to infant development after mothers get flu vaccine while pregnant

February 5, 2020

A Kaiser Permanente study of women who were given inactivated influenza vaccine while pregnant found no indication of developmental problems for their babies at 6 months old.

Waning potency of pertussis vaccine a significant contributor to recent whooping cough outbreaks

June 9, 2019

Children who were up to date on their pertussis vaccine schedule were far less likely to develop the disease than those unvaccinated. The risk of vaccinated children becoming ill increased with time since vaccination, suggesting waning effectiveness.

The New Faces of Health Care Research, Pt. 2

January 30, 2019

In part 2 of our profile series, meet the last three of the seven early-career researchers who began their post-doctoral appointments this past year and represent not only diverse communities but diverse research interests as well.

The New Faces of Health Care Research

January 22, 2019

Seven early-career researchers began their post-doctoral appointments this past year and represent not only diverse communities but diverse research interests as well. This is Part 1 of our new class profile.

Work by the Division of Research Makes Top JAMA Lists for 2018

January 14, 2019

The JAMA Network, the publication home for numerous top-tier journals from the American Medical Association, released a list of the “Most Talked About Articles” in each of their various publications for 2018. DOR research appears on four lists.

Flu Vaccine Prevents Flu-Related Hospitalizations in Pregnant Women

October 11, 2018

Kaiser Permanente collaborated with CDC researchers to study the effectiveness of flu vaccinations in preventing influenza-associated hospitalizations during pregnancy.

Q&A: Talking Flu Shots with Nicola Klein, Director of Kaiser Permanente’s Vaccine Study Center

September 19, 2018

Dr. Klein’s latest research raised some interesting questions about when influenza vaccinations are most effective, so we spoke with her to learn more and answer some common flu vaccine questions.

Children With Autism and Their Younger Siblings Less Likely to Be Fully Vaccinated

March 26, 2018

Children with autism and their younger siblings are significantly less likely to be fully vaccinated than the general population, according to new research published in JAMA Pediatrics.

Eight Weeks or Twelve? Kaiser Permanente Study Shows Shorter Hepatitis C Regimen Effective in Black Patients

March 15, 2018

A new study shows that a treatment regimen of 8 weeks for hepatitis C may be just as effective as 12 weeks in black patients. The study also showed that more people overall can take advantage of the shorter treatment durations, which has important implications for access given the medication’s high cost.

Why Parents Should Continue to Vaccinate Their Kids

August 10, 2017

As a research scientist for the Kaiser Permanente Northern California Division of Research and director of KP’s Vaccine Study Center, it’s Nicola Klein’s job to study the safety and effectiveness of both new and older vaccines.

Maternal Pertussis Vaccination Reduces Risk for Newborns by More Than 90 Percent

April 2, 2017

Among infants of women who received the Tdap pertussis booster vaccine during pregnancy, the risk of contracting pertussis was reduced...

Vaccine Study Center Research Yields Valuable Knowledge on Vaccines for Children and Adolescents

November 13, 2012

The Kaiser Permanente Vaccine Study Center (VSC), which conducts research to advance scientific understanding of vaccines at all levels of...

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