Walmart Inc. is preparing to offer Covid-19 vaccinations in seven more states, as well as in Chicago and Puerto Rico, expanding beyond the two states where the company’s pharmacists are offering inoculations.

Chicago’s mayor issued a month-long stay-at-home advisory, and Detroit’s public schools called a halt to in-person instruction to curb the spread of the coronavirus as more than a dozen U.S. states reported a doubling of new Covid-19 cases in the last two weeks.

Students in Boston’s public schools will shift to remote learning due to the rising Covid-19 infection rate in the city that was ravaged by the pandemic in the spring.

The number of new Covid-19 cases among children in the United States rose 40% in the last two weeks of July, according to a report released just weeks before tens of millions of American students are scheduled to begin the new school year.

Americans were back on the road after more than two months of coronavirus lockdowns that kept them homebound, with beach-area traffic tripling since the low point in mid-April.

New York is nearing a plateau in the number of coronavirus patients hospitalized, a sign of optimism even though the number of the deaths in the state hit a single-day high, Governor Andrew Cuomo said.