In an interview with Joe Rogan, Bret Weinstein says the COVID vaccines given to the public were different than the ones tested in the original trials. He also claims that they may contain leftover DNA with part of a cancer-linked virus.

The concerns about changes in the vaccines tested when they were introduced are not true. Making a few vaccines for a test is different from manufacturing thousands of doses at once. Process 1 is the small test batch, and Process 2 is the larger version for real use. Even though the two processes are different, both have to follow the same safety and quality rules, and the vaccines must meet the same high standards.

Claims that COVID vaccines cause cancer are not true and come from confusion about what’s in the vaccines. For example, a small piece of DNA called a promoter from a virus known as SV40 was once used in making vaccines to help create the proteins they need. But the manufacturing process removes it, and no credible studies show that COVID vaccines cause cancer or are linked to SV40 DNA.

In a video, Dr. Sherri Tenpenny claims that babies’ bodies can’t get rid of aluminum from vaccines until they are two years old, so it builds up in their brains and organs.

Aluminum is sometimes added to vaccines as an adjuvant, to help the body’s immune system respond better. This means children need fewer doses to get full protection.

Research has shown over and over that the tiny amount of aluminum in vaccines is far below levels that could be harmful. Our bodies already handle small amounts of aluminum because it’s naturally found in food, water, and even some medicines.

Most of the aluminum from vaccines leaves the body quickly through the kidneys. One study published in Vaccine found that the amount in vaccines is much smaller than what people take in every day from food and the environment.

The small amount that stays in the body for a short time does not build up to dangerous levels. Vaccines save millions of lives every year, and their benefits are much greater than the very small and disproven risks sometimes claimed.

A recent study from Denmark looked at the health of more than 1.2 million children over many years. The researchers checked for long-term problems like asthma, autism, and other ongoing illnesses. Because the study was so large and carefully done, it gives very strong evidence that aluminum in vaccines does not cause chronic health problems in children.

In a video, a Peter McCullough colleague claims that vaccines are made using cells from old abortions, that they have pieces of fetal DNA in them, and that this DNA can integrate and combine with a person’s own cells.

A number of scientists have found the conclusions about the paper referenced by McCullough, written by Theresa Deisher, which self-references her own work, to be “unsupported and implausible.” As pointed out by Teja Celhar, “the whole hypothesis of the author (which is misleadingly presented as fact) is based on the author’s own measurements of fetal cell-derived DNA, which has serious methodological problems that could be easily prevented by RNase treatment. Additionally, the measurements should have been validated by a different method (e.g. qPCR, capillary gel electrophoresis) and ideally by an independent researcher/institution.”

Viruses are obligate intracellular parasites that need host cells to grow. Since human cells are sometimes best for growing human viruses, some vaccines use cell lines derived from two elective pregnancy terminations back in the 60s. Because these cell lines are practically immortal, manufacturers can continue using this cell line; there are no new sources of human fetal cells.

Dr. Stanley Plotkin, in a series of videos, explains how we can use fetal cell lines developed decades ago to manufacture vaccines today. The cell lines provided multiple advantages, including absence of animal viruses, a fertile place for cell growth, and the immortality of the cells (meaning no new fetuses need be destroyed to make another cell line).