Thursday April 18, 2019

HPV Vaccines Are Effective, Especially For Teens

The Cochrane research pooled data and results from 26 studies involving more than 73,000 women across all continents over the last eight years.

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She noted that some campaign groups have expressed concern about HPV vaccines, but said this review had found no evidence to support claims of increased risk of harm.
HPV Vaccine i effective on teenage girls, Pexels

Vaccines designed to prevent infection with human papillomavirus (HPV) are effective in protecting against pre-cancerous cervical lesions in women, particularly in those vaccinated between age 15 and 26, according to a large international evidence review.

The research by scientists at the scientific network the Cochrane Review also found no increase in the risk of serious side effects, with rates of around 7 percent reported by both HPV-vaccinated and control groups.

“This review should reassure people that HPV vaccination is effective,” Jo Morrison, a consultant in gynecological oncology at Britain’s Musgrove Park Hospital, told reporters at a briefing about the review’s findings.

She noted that some campaign groups have expressed concern about HPV vaccines, but said this review had found no evidence to support claims of increased risk of harm.

HPV is one of the common sexually transmitted diseases. Most infections do not cause symptoms and go away on their own, but when the immune system does not clear the virus, persistent HPV infection can cause abnormal cervical cells.

Drugmakers GlaxoSmithKline and Merck make vaccines that protect against HPV.
A girls getting vaccine, VOA

These pre-cancerous lesions can progress to cervical cancer if left untreated. HPV is a leading cause of cancer deaths among women worldwide, according to the World Health Organization.

Drugmakers GlaxoSmithKline and Merck make vaccines that protect against HPV.

The Cochrane research pooled data and results from 26 studies involving more than 73,000 women across all continents over the last eight years.

The researchers found that in young women who tested negative for HPV, vaccination reduced the risk of developing precancer. About 164 out of every 10,000 women who got placebo developed cervical pre-cancerous lesions, compared with two out of every 10,000 who were vaccinated.

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Looking more broadly across all women in the studies, regardless of whether they had previously had HPV or not, the vaccines were found to be slightly less effective, but still reduced the risk of cervical precancer from 559 per 10,000 to 391 per 10,000.

Experts not directly involved in the review said its findings were robust and important.

“This intensive and rigorous Cochrane analysis … provides reassuring and solid evidence of the safety of these vaccines in young women,” said Margaret Stanley, a specialist in the pathology department at Cambridge University. “It reinforces the evidence that preventing infection by vaccination in young women … reduces cervical precancers dramatically.” (VOA)

 

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The All New Vaccine Will Eliminate HPV Infection, Claims Study

Harper also noted TS is different from Gardasil9, the vaccine given to prevent HPV infection. While Gardasil9 prevents HPV infection from occurring, TS clears tissue infected with it. 

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HPV
While "the surgical procedure removes all the tissue that is headed towards cancer, it does not remove all the HPV. You still have HPV", Harper said, adding the new vaccine "actually treats the cause of the disease, which is HPV". VOA

A new experimental immune-based vaccine has cleared human papillomavirus (HPV) in a third of women with cervical cancer precursors, according to clinical trial results.

The therapeutic vaccine, called Tipapkinogen Sovacivec (TS), injects a specific protein that triggers an immune system response to attack high-risk HPV types that cause nearly all cervical cancer precursors, known as cervical intraepithelial neoplasia (CIN).

HPV is a common sexually transmitted infection and causes warts in the body.

Doctor
While “the surgical procedure removes all the tissue that is headed towards cancer, it does not remove all the HPV. You still have HPV”, Harper said, adding the new vaccine “actually treats the cause of the disease, which is HPV”. VOA

The vaccine eliminated both precancerous skin growth in the cervix, and underlying HPV infection in a third of women enrolled in the clinical trial, according to the report in the journal Gynecologic Oncology.

“There are few products trying to cure women with an HPV infection,” said Diane Harper, professor at the University of Michigan. “It’s exciting. This is the first time we’ve seen something with this success rate and that is relatively easy to implement,” Harper said.

The study enrolled 192 women, diagnosed with precancerous skin growths, randomising 129 to receive the vaccine and 63, placebo.

Women were given three shots in thighs, one per week. Six months later, the women were treated with standard surgical procedures and the removed tissue was examined. As many as 15-36 per cent of those who were vaccinated saw their more severe precancerous skin growths eliminated, but none in the placebo group.

Doctor
While “the surgical procedure removes all the tissue that is headed towards cancer, it does not remove all the HPV. You still have HPV”, Harper said, adding the new vaccine “actually treats the cause of the disease, which is HPV”. VOA

While “the surgical procedure removes all the tissue that is headed towards cancer, it does not remove all the HPV. You still have HPV”, Harper said, adding the new vaccine “actually treats the cause of the disease, which is HPV”.

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Harper also noted TS is different from Gardasil9, the vaccine given to prevent HPV infection. While Gardasil9 prevents HPV infection from occurring, TS clears tissue infected with it.

The researchers envision testing TS for several other types of cancer, including head, neck and anal cancer, that are linked to HPV. (IANS)