Search Results for vaccines

Vaccines don’t contain cells or tissues of aborted fetuses

Several vaccines use full viruses that have been modified in the lab to be harmless to humans but still able to train the immune system to fight a specific pathogen. Manufacturing viruses requires the use of human cells to grow them because viruses cannot proliferate outside a cell. These cells are sometimes derived from a few fetuses aborted at least three decades ago. However, these cells are destroyed and removed during the vaccine manufacturing process. Therefore, vaccines don’t contain tissues from aborted fetuses.

COVID-19 mRNA vaccines were tested in clinical trials, aren’t experimental

Clinical trials and ongoing vaccine monitoring efforts show that COVID-19 vaccines are effective at reducing a person’s risk of severe disease and death. Like any medical intervention, vaccines also come with risks. While COVID-19 mRNA vaccines are linked to a slight increase in the risk of myocarditis (inflammation of the heart muscle), COVID-19 itself is associated with a greater risk of heart inflammation and other health complications. On balance, the benefits of the COVID-19 mRNA vaccines outweigh their risks.

Modified RNA in COVID-19 vaccines isn’t linked to cancer development

The mRNA COVID-19 vaccines contain RNAs with chemical modifications that increase their stability and improve their ability to induce a potent immune response. Some results suggest that such chemical modifications make mRNA-based anti-cancer vaccines less effective. However, it doesn’t mean that COVID-19 vaccines increase the risk of cancer. There’s no evidence that COVID-19 vaccination increases the risk of cancer.

Country-to-country comparison doesn’t show that COVID-19 vaccines are ineffective, contrary to Facebook post by journalist Sharyl Attkisson

When comparing country-level COVID-19 data, care must be taken when drawing conclusions because such analyses come with a high risk of bias. It is important to account for many factors, such as COVID-19 testing policy, each country’s age distribution, and compliance with COVID-19 preventive measures, because these are all factors that affect COVID-19 outcomes reported in each country.

2019 report by TV host Sharyl Attkisson exaggerates one expert’s opinion in court case to claim vaccines cause autism

The Omnibus Autism Proceeding was a legal process that aimed to collectively resolve thousands of vaccine injury claims submitted to the National Childhood Vaccine Injury Compensation Program in the late 1990s. The petitions were based on incorrect allegations that vaccines caused autism in children. The U.S. Court of Federal Claims ultimately rejected all the petitions after finding no evidence supporting the claims. Multiple large studies have shown that vaccines don’t cause autism.

Are claims linking recent U.S. trends in cancer diagnoses to COVID-19 vaccines plausible? A look at the available data

Claims questioning COVID-19 vaccine safety have circulated continuously since COVID-19 vaccination campaigns began at the end of 2020. One such claim suggests that there has been an unprecedented rise in the number of cancer cases after the COVID-19 vaccine rollout, implying that the vaccines are responsible for this phenomenon. Science Feedback previously explained why this … Continued

Steve Kirsch promotes flawed study making false claim about COVID-19 vaccines and cancer risk

People with cancer are at a greater risk of developing severe COVID-19. This group is recommended to get vaccinated against COVID-19 as the vaccines reduce the risk of severe disease. Clinical trials and post-marketing monitoring have shown that the vaccines are safe, with their benefits outweighing their risks. To date, there’s no data suggesting that COVID-19 vaccines are associated with a greater risk of cancer or an acceleration in cancer progression.

CDC analysis of RSV vaccines data showed vaccines are safe, not associated with excess deaths, contrary to claim by Children’s Health Defense

Respiratory Syncytial Virus (RSV) infections are very common during winter. Most of them are mild but complications can lead to pneumonia and bronchiolitis, especially in babies and older adults. RSV vaccines are effective and recommended for people above 60. Current evidence indicates their benefits outweigh their risks. Further research is needed to determine if these vaccines are associated with a higher risk of Guillain-Barré syndrome.

Vaccines, treatments reduced public health threat posed by COVID-19, explaining different approach in 2024 compared to 2020

Over time, COVID-19 has become a smaller threat to public health than it was in 2020 and 2021. The combination of vaccination, better treatments, widespread immunity among the population, and the emergence of SARS-CoV-2 variants mean that COVID-19 patients now experience milder disease and are less likely to die. These improvements have reduced the overall risk posed by COVID-19, justifying a change in guidelines.

Childhood vaccine ingredients are safe in the amount present in vaccines; cells, animal products, and viruses aren’t part of these ingredients

Childhood vaccination is one of the greatest public health achievements in history. All the ingredients in vaccines are extensively tested for safety and don’t cause harm in the amounts present in vaccines. On the contrary, routine immunizations save millions of lives every year and prevent many serious infectious diseases that were commonplace only a few generations ago.