Without widespread and frequent testing, it’s impossible to know how many people without symptoms may be carrying the virus that causes COVID-19. RacingforaRemedy
Jessie Cornwell, a resident of the Ida Culver House Ravenna, right, poses for a photo with the Rev. Jane Pauw, in Seattle on May 21, 2020. Cornwell tested positive for the coronavirus but never became ill, and may have been infectious when she shared a ride to Bible study with Pauw, who later got sick with COVID-19. It first flared in central China and, within three months, was on every continent but Antarctica, shutting down daily life for millions.
“For control, to actually keep the virus from coming back, we’re going to have to deal with this issue,” said Rein Houben, a disease tracker at the London School of Hygiene and Tropical Medicine. At the turn of the 20th century, a seemingly healthy New York cook named Mary Mallon left a deadly trail of typhoid infections that captivated the public and led to her being forced into quarantine on an East River island. “Typhoid Mary” remains a haunting symbol of silent spread.
“We were reassuring ourselves and the public that contact with an asymptomatic person was not a risk,” said Dr. Jeff Duchin of King County, Washington, where the first major U.S. cluster of coronavirus cases broke out at the Life Care nursing home.Meyers had assembled a team of students who scoured websites of Chinese health departments looking for dates of symptom onset in situations where there was enough information to figure out who infected whom.
Without widespread and frequent testing, it’s impossible to know how many people without symptoms might carry it. The Diamond Princess, which idled in the Port of Yokohama, Japan, while the virus exploded onboard, enticed researchers.Houben and his London research team set out to build a mathematical model to estimate how many infected people without symptoms were being missed.
Elizabeth Schneider, who was among the 30 or so attendees, recalled it as a low-key evening themed around a coconut-lime cocktail, with some guests getting in the spirit with Hawaiian shirts or other tropical attire. The host had hired a bartender to serve drinks and keep an eye on the food. Hunt died March 9, becoming one of the first American casualties of COVID-19. A day later, 82-year-old Cornwell tested positive, along with two other residents, all of whom were put into isolation.Elsewhere, as testing efforts have widened, huge proportions of asymptomatic people have shown up, from a neighborhood in San Francisco to an aircraft carrier in the Pacific.
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