Coronavirus clue? Most cases aboard U.S. aircraft carrier are symptom-free

Sweeping testing of the entire crew of the coronavirus-stricken U.S. aircraft carrier Theodore Roosevelt may have revealed a clue about the pandemic: The majority of the positive cases so far are among sailors who are asymptomatic, officials say. The possibility that the coronavirus spreads in a mostly stealthy mode among a population of largely young, healthy people showing no symptoms could have major implications for U.S. policy-makers, who are considering how and when to reopen the economy. It also renews questions about the extent to which U.S. testing of just the people suspected of being infected is actually capturing the spread of the virus in the United States and around the world.

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