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Sanofi, GSK COVID vaccine shows strong immune response in phase 2 trials

Sanofi and GSK announcedthis morning their COVID-19 vaccine candidate demonstrated a strong immune response in adults in a phase 2 clinical trial.

Why it matters: Sanofi and GSK say their recombinant protein-based vaccine candidate could ultimately serve as a universal COVID-19 vaccine booster, able to boost immunity regardless of the vaccination first received.


Details: Sanofi and GSK said the vaccine triggered an antibody response in 95% to 100% of all the trial participants, ages 18 to 95, who got the vaccine.

  • The companies also observed a "high immune response after a single dose in patients" who previously recovered from COVID-19, which shows the vaccine has strong booster potential.
  • It's a promising development after the companies had to delay their vaccine in December to improve immune response in older adults. Still, it's also important to point out this is a phase 2 clinical trial, a relatively small study with 722 volunteers in the U.S. and Honduras.

A global Phase 3 trial with more than 35,000 participants from various countries is expected to start in the coming weeks to test the efficacy of two vaccine formulations against variants, officials said.

  • In parallel, the companies also plan to conduct booster studies.
  • Should the candidate prove successful in clearing Phase 3 testing and other regulatory hurdles, officials said a vaccine could be approved by the end of 2021.

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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.

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Russians hacked federal prosecutors, Justice Department says

The Russian hackers behind the massive SolarWinds cyber-espionage campaign broke into the email accounts of some of the most prominent federal prosecutors' offices around the country last year, the Justice Department announced.

State of play: DOJsaid 80% of Microsoft email accounts used by employees in the four U.S. attorney offices in New York were breached.

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