Quantcast

Mix-And-Match COVID Vaccines Trigger Potent Response

A trial of more than 600 people shows what happens when you combine different vaccines. PLUS: Could COVID vaccine cause male infertility?

NATURE – Vaccinating people with both the Oxford–AstraZeneca and Pfizer–BioNTech COVID-19 vaccines produces a potent immune response against the virus SARS-CoV-2, researchers conducting a study in Spain have found.

Preliminary results from the trial of more than 600 people — announced in an online presentation on 18 May — are the first to show the benefits of combining different coronavirus vaccines. A UK trial of a similar strategy reported1 safety data last week, and is expected to deliver further findings on immune responses soon.

Because of safety concerns, several European countries are already recommending that some or all people who were given a first dose of the vaccine developed by the University of Oxford, UK, and AstraZeneca in Cambridge, UK, get another vaccine for their second dose.

Researchers hope that such mix-and-match COVID-19 vaccination regimens will trigger stronger, more robust immune responses than will two doses of a single vaccine, while simplifying immunization efforts for countries facing fluctuating supplies of the various vaccines.

“It appears that the Pfizer vaccine boosted antibody responses remarkably in one-dose AstraZeneca vaccinees. This is all around wonderful news,” says Zhou Xing, an immunologist at McMaster University in Hamilton, Canada.

...article continued below
- Advertisement -

Starting in April, the Spanish CombivacS trial enrolled 663 people who had already received a first dose of the Oxford–AstraZeneca vaccine, which uses a harmless chimpanzee ‘adenovirus’ to deliver instructions for cells to make a SARS-CoV-2 protein.

Two-thirds of participants were randomly picked to receive the mRNA-based vaccine made by Pfizer, based in New York City, and BioNTech, in Mainz, Germany, at least eight weeks after their first dose.

A control group of 232 people has not yet received a booster. The study was led by the Carlos III Health Institute in Madrid.

The Pfizer–BioNTech booster seemed to jolt the immune systems of the Oxford–AstraZeneca-dosed participants, reported Magdalena Campins, an investigator on the CombivacS study at the Vall d’Hebron University Hospital in Barcelona, Spain.

After this second dose, participants began to produce much higher levels of antibodies … Click here to read more. 

Could COVID-19 vaccine cause male infertility? The answer is nuanced

...article continued below
- Advertisement -

Nicole Villalpando, May 17, 2021

Austin American-Statesman – People give all kinds of different reasons for not getting the COVID-19 vaccines. They question the science behind it. They worry about the side effects. They worry about the newness of it.

One of the recurring statements being heard is that it causes infertility among men, or parents fearing for a teenage son’s future fertility.

There is a kernel of truth to it, but it’s not because of the vaccine. It’s because of a side effect that can happen with any vaccine, or getting a cold, flu or even COVID-19.

Joel Hawkes of Travis County Fire and Rescue fills a syringe with a Pfizer vaccine. The Pfizer, Moderna and Johnson & Johnson vaccines have not shown to cause long-term infertility in men.
A fever can temporarily suppress male fertility, says Dr. Parviz Kavoussi, a reproductive urologist at St. David’s South Austin Medical Center.

About 16 percent of people might experience fever after receiving one of the COVID-19 vaccines, Kavoussi says, which is why there might be some link between getting the vaccine and temporary male infertility.

Anytime a man has a fever, fertility can be affected for about three months, Kavoussi says. “At three months, it’s going to bounce back,” he says.

This matters for couples who are dealing with infertility. They might need to wait until three months after having any fever, whether caused by a side effect of the vaccine, or COVID-19 itself, for his fertility to recover. By six months, it should be back to what it was before the fever, Kavoussi says.

“It’s a temporary suppression, even in infertile couples,” he says … Read more here. 

- Advertisement -
- Advertisement -

TRENDING

GMO Salmon Producers Find Giant Loophole In US Labeling Laws

Biotech company AquaBounty Technologies Inc. announced that it is harvesting several tons of genetically modified salmon, which will soon be sold at restaurants and other “away-from-home” dining retailers around the country where the federal GMO labeling law does not apply.

“Should I reschedule my mammogram if I recently received the COVID-19 vaccine?”

“The most important thing patients should understand is that there is no danger of breast cancer associated with the COVID-19 vaccine, and you should plan on getting your vaccines as soon as you are eligible.”

US Rep.: Biden Spends 22x More on Illegal Alien Childcare Vs. Americans

HEADLINE USA – Rep. Bill Johnson, R-Ohio, attacked President Joe Biden‘s administration for its reckless spending on care for illegal immigrant children while neglecting...

States Return Unwanted Vaccines To Federal Agencies

Demand for the COVID-19 vaccine has slowed down so much that two states have given millions of doses back to the federal government, even though less than half of their total populations are vaccinated.

Scores Lose Jobs For Refusing Vaccine

Scores of workers at a Houston hospital system have been suspended and face being fired for refusing the COVID-19 vaccination, a controversial company mandate that has drawn protests and an outcry from those facing termination.USA TODAY – Scores of workers at a Houston hospital system have been suspended and face being fired for refusing the COVID-19 vaccination, a controversial company mandate that has drawn protests and an outcry from those facing termination.

Bought And Paid For: Big Pharma Doles Out Campaign Cash To 2,400 Legislators

WASHINGTON — State lawmakers in Oregon have tried to lower high drug prices from nearly every angle: They’ve sought to cap how much people can...

Only “Armageddon” Can Stop Tokyo Olympics Now: Officials

THE GUARDIAN – When the trickle of Olympic athletes arriving in Tokyo turns into a deluge next month, more than 11,000 competitors will find...

New Tech Could Doom Invasive Pythons

Researchers at the University of Central Florida have published a first-of-its-kind study that shows that near-infrared (NIR) spectrum cameras can help hunters more effectively track down these invasive snakes, especially at night.

Cal. Dems. Want $100 Million For ‘Health Equity’

KAISER HEALTH NEWS, SACRAMENTO — After the killing last year of George Floyd, a Black man, by a white Minneapolis police officer, Wisconsin Gov....

Biden’s Plan To Give Free Vaccines To The World

MAWGAN PORTH, England (AP) — One year ago, the U.S. was the deadliest hotspot of the COVID-19 pandemic, forcing the cancellation of the Group...
- Advertisement -