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Study: Delta coronavirus variant evades certain antibodies because of mutations

One dose of the Pfizer or AstraZeneca coronavirus vaccine "barely" protects against the Delta variant of the virus, because of mutations the variant has developed, according to a new study published in the journal Nature Thursday.

Why it matters: The study found that two doses of those vaccines generated a neutralizing response to the variant in 95% of people, highlighting the importance of full vaccination against COVID-19.


  • The findings may also offer an explanation for why the Delta variant is rapidly spreading in multiple countries around the world — including the U.S., where it is now the most dominant version of the virus.

How it works: The team of French researchers tested how efficiently antibodies produced through natural infections or vaccines neutralized variants of the coronavirus, including Delta, which was first identified in India.

  • They discovered that the Delta variant has developed mutations to cell entry mechanisms that allow it to evade certain antibodies.
  • While one dose of Pfizer's or AstraZeneca's vaccines was less effective at neutralizing the variant compared to two, it still performed better than the antibodies produced through natural infection, suggesting that people who contracted the virus may still need vaccine to help defend against variants.

Flashback: A study in The Lancet published in June found that the Delta variant is primarily a threat to people who have not been vaccinated.

  • Unvaccinated people were twice as likely to be hospitalized if they were infected by the Delta variant compared to infections from the Alpha variant, which was first detected in the United Kingdom.

What they're saying: "In parts of the Midwest and upper mountain states, [the Centers for Disease Control and Prevention's] early sequence data suggests the Delta variant accounts for approximately 80% of cases," said CDC Director Rochelle Walensky during a briefing on Thursday.

  • "To be clear, there will likely continue to be an increase in cases among unvaccinated Americans, and in communities with low vaccination rates, particularly given the spread of the more transmissible Delta variant," Jeffrey Zients, the White House coronavirus response coordinator, said.

Go deeper: Delta variant threatens masking guidance

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Fall antitrust forecast: Biden raises hammer on Big Tech

The antitrust scrutiny of tech giants that began during the Trump era will only intensify this fall as Big Tech critics Lina Khan, Tim Wu and Jonathan Kanter take the lead on competition policy and enforcement in the Biden administration.

Why it matters: Facebook, Google, Amazon and Apple face threats from federal regulators, Congress, state attorneys general and European Union authorities.

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5 Reasons Why We Decided To Homeschool

First things first. We have a deep respect for the public school system and teachers in general. We have several friends and family members that are educators. This post is not a manifesto for why everyone should drop the public system and start homeschooling their children. In fact, it's not meant to sway you in one way or the other. It's simply a chronicle of the thought process that Lynn and I employed when making the final decision this year to give homeschool a shot.

Choosing to home school our children wasn't an easy or quick decision, which it shouldn't be. But we considered every option and weighed the pros vs the cons. We made our ultimate decision based on what is best for our children and our family.

Education is a critical part of every child's development. So it's no wonder that parents (and even non-parents) are so passionate about schooling.

We're no different.

Yet we've still been on the receiving end of the awkward glances and ill-worded reactions when we explain that we're taking education in-house. I get it. It's different. It's not in the mainstream, and that's OK.

So let me outline for you our 5 core reasons for traveling this path.

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