A health care worker from the United States of America has been diagnosed with Ebola after treating a patient who died of the deadly disease last week, sending officials scrambling to find the "breach in protocol" that resulted in her infection - the first case contracted on American soil.
We sorted through countless photographs taken around the world to come up with the top photos of 2019. Together these images tell the story of the year -- capturing moments of hope and heartbreak, triumph and tragedy.