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WASHINGTON (Reuters) – Dozens of former Republican U.S. national security officials are forming a group that will back Democratic presidential candidate Joe Biden, people familiar with the effort said, in a further sign that President Donald Trump has alienated some members of his own party. FILE PHOTO: United States Democratic …

LONDON (Reuters) – A test in pigs of AstraZeneca (AZN.L) The experimental vaccine COVID-19 has found that two doses of the injection produce a greater antibody response than a single dose. Research published Tuesday by Britain’s Pirbright Institute found that administering an initial main dose followed by a booster dose …