Canadian troops from Manitoba to serve as Queen's Guard at Buckingham Palace

Captain of the Guards Major Michael Crosier, pictured right, leads The Royal Regiment of Canadian Artillery United Kingdom Public Duties Contingent during their Fit for Role inspection conducted by senior officers of the British Army’s Household Division at Wellington Barracks in London, England on September 27, 2021. (Source: Master Corporal Heather MacCrae, Image Tech, Royal Regiment of Canadian Artillery Public Duties Contingent) Captain of the Guards Major Michael Crosier, pictured right, leads The Royal Regiment of Canadian Artillery United Kingdom Public Duties Contingent during their Fit for Role inspection conducted by senior officers of the British Army’s Household Division at Wellington Barracks in London, England on September 27, 2021. (Source: Master Corporal Heather MacCrae, Image Tech, Royal Regiment of Canadian Artillery Public Duties Contingent)

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Why COVID-19 boosters weren't tweaked to better match variants

More COVID-19 booster shots may be on the way -- but when it's your turn, you'll get an extra dose of the original vaccine, not one updated to better match the extra-contagious delta variant. And that has some experts wondering if the booster campaign is a bit of a missed opportunity to target delta and its likely descendants.

Registered nurse Alix Zacharski, left, receives a Pfizer COVID-19 booster shot from Douglas Houghton, right, at Jackson Memorial Hospital Tuesday, Oct. 5, 2021, in Miami. (AP Photo/Lynne Sladky)

Colin Powell dies, exemplary general stained by Iraq claims

Colin Powell, the barrier-breaking soldier and diplomat who served Democratic and Republican presidents in war and peace but whose sterling reputation was stained by his faulty claims to justify the U.S. war in Iraq, died Monday of COVID-19 complications. He was 84.