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190 articles from Yahoo!

AstraZeneca's COVID-19 vaccine candidate begins late-stage U.S. study

Trial participants will receive either two doses of the experimental vaccine, dubbed AZD1222, four weeks apart, or a placebo, the company said. The trial is being conducted under U.S. government's Operation Warp Speed program, which aims to accelerate development, manufacturing and distribution of vaccines and treatments for COVID-19. U.S. President Donald Trump has said a vaccine for the novel...

COVID-19 often goes undiagnosed in hospital workers; virus may impair heart functions

A high proportion of COVID-19 infections among U.S. healthcare personnel appear to go undetected, according to a report on Monday in the Morbidity and Mortality Weekly Report of the U.S. Centers for Disease Control and Prevention. Between April and June, among more than 3,000 frontline workers in 12 states, roughly 1 in 20 had antibody evidence of a previous COVID-19 infection, but 69% of those...

Composing for flamingos: Duo pens score for nature special

The man who composed the music to “The Lion King” is just as comfortable with real lions, too. Oscar-winning composer Hans Zimmer scores such stunning nature sequences as goofy flamingos on parade and lions hunting in the Namib desert for “Planet Earth: A Celebration.” The animals are acting on instinct and so is Zimmer, in a way. The one-hour special pulls together sequences from...

Scientists see downsides to top COVID-19 vaccines from Russia, China

High-profile COVID-19 vaccines developed in Russia and China share a potential shortcoming: They are based on a common cold virus that many people have been exposed to, potentially limiting their effectiveness, some experts say. CanSino Biologics' vaccine, approved for military use in China, is a modified form of adenovirus type 5, or Ad5. The company is in talks to get emergency approval in...

How common cold viruses are being used in vaccines from Russia, China

The modified adenovirus type 5 (Ad5) viruses used in these vaccines were first created by Canadian researcher Dr. Frank Graham at a Dutch lab in the 1970s. WHAT ARE VECTORS USED IN VACCINES AND HOW DO THEY WORK? Vectors are materials used as mechanisms to carry genetic information into human...

Scientists see downsides to top COVID-19 vaccines from Russia, China

High-profile COVID-19 vaccines developed in Russia and China share a potential shortcoming: They are based on a common cold virus that many people have been exposed to, potentially limiting their effectiveness, some experts say. CanSino Biologics' vaccine, approved for military use in China, is a modified form of adenovirus type 5, or Ad5. The company is in talks to get emergency approval in...