Tests offer clues on how illiness is spreading in U.S.

An increase in testing for the coronavirus began shedding light Monday on how the illness has spread in the United States, including among nursing home residents in one Washington

state facility.

New diagnoses in several states pushed the tally of COVID-19 cases past 100, and New Hampshire reported its first case, raising the total of affected states to 11. Seattle officials announced four more deaths, bringing the total in the U.S. to six.

In Seattle, King County Executive Dow Constantine declared an emergency and said the county was buying a hotel to be used as a hospital for patients who need to be isolated. He said the facility should be available by the end of the week.

“We have moved to a new stage in the fight,” he said.

Vice President Mike Pence met with the nation’s governors and pledged to continue updating them weekly by teleconference. President Donald Trump met with pharmaceutical companies to talk about progress toward a vaccine.

Four of the dead were residents of a nursing home in Kirkland, Washington, according to King County health authorities. The nursing home cases especially troubled health care experts because of the vulnerability of sick and elderly people to the illness and existing problems in nursing facilities.

“It’s going to be a disaster,” said Charlene Harrington, who studies nursing homes at the University of California, San Francisco. Infection is already a huge problem in U.S. nursing homes because of a lack of nurses and training.

In Texas, tension between U.S. and local officials brewed over the planned release Monday of more than 120 ex-passengers of the Diamond Princess cruise ship in quarantine in San Antonio. Mayor Ron Nirenberg declared a public safety emergency in an attempt to continue the quarantine. He and other officials in San Antonio called for more lab testing of the passengers after one woman tested positive after release.

The Centers for Disease Control and Prevention said its case count includes 45 infections among people who were on the cruise ship, one more than previously reported. The count includes people who tested positive after returning from travel to outbreak areas in other parts of the world, their close contacts and infections that appear to be from community spread — people who did not travel or have known contact with other infected people.

The CDC recently broadened its guidelines for who should be tested for the new virus to include people with symptoms but without a travel history to virus hot zones.

More testing will bring more confirmed cases, experts said, but they cautioned that does not mean the virus is gaining speed. Instead, the testing is likely to reveal a picture of the virus’ spread that was previously invisible.

In Seattle, schools and one skyscraper closed, but health experts cautioned that closures can have downsides.

On Monday, the F5 technology company said it was closing its 44-story tower in downtown Seattle after learning an employee had been in contact with someone who tested positive for coronavirus. The employee tested negative, but company spokesman Rob Gruening said the tower was closed as a precaution.

More than 10 schools in the Seattle area were closed for deep cleaning over virus concerns, although the citycounty public health department said it was not yet recommending school closures or cancellation of activities.

Closing schools and canceling large gatherings are what’s called social distancing, the idea that distancing people will reduce spread.

The evidence for those steps is “not as strong as we would like it to be,” Jennifer Nuzzo of the Johns Hopkins Center for Health Security cautioned Monday during a webinar.