But the virus is persisting — and, in some places, spreading aggressively — in parts of the South, Midwest and West, including in states that were among the last to impose shutdowns and the first to lift them.

Data compiled by The Washington Post shows that 23 states, as well as the District of Columbia and Puerto Rico, have seen an increase in the rolling seven-day average of coronavirus cases compared with the previous week.

Now, public health officials across the nation are warily eyeing caseloads and hospitalizations to see if there is a spike in infections resulting from mass protests against racism and police violence.

The notion of civic duty has, in part, contributed to a rapid shift in the public response to the coronavirus epidemic.

Public health experts and local authorities in many places once urged so much caution that shutdowns ensued, streets emptied and grieving families were forced to limit or cancel funerals.

The coronavirus map is, indeed, complicated at this point — as complicated as the virus itself, which can lead to the potentially lethal disease covid-19 or leave an infected person with no symptoms at all.

FEMA tracks how many days in a row a state records a decline in new daily coronavirus cases.

Thirteen states — Arizona, California, Idaho, Kentucky, Mississippi, Nebraska, Oregon, South Carolina, Tennessee, Texas, Virginia, Washington and Wisconsin — had not shown a sustained daily decrease as of Tuesday, according to the document, a copy of which was obtained by The Post.

New data shows that almost a third of the deaths nationally have been in nursing homes.

Three generations of a Baltimore family express anger, grief over two public health crises — coronavirus and police violence — after loss of 15-year-old to covid-19.

More than half the state’s cases so far have been in the South Florida counties of Broward, ­Miami-Dade, Monroe and Palm Beach.

“I still think we have a lot of cases to come,” said Julie Swann, a former CDC adviser and professor of industrial and systems engineering at North Carolina State University, who said the continued spread was not inevitable and could have been stopped with sufficient testing and tracing.

There is another lag of days before results reach public health departments.

Many of the people who traveled to beaches and other locations on Memorial Day weekend, and who participated in protests against police violence, are young and less likely than older people to develop a serious illness from the virus.

A new report published in the journal Science says weather isn’t as important as susceptibility: Most people have yet to be exposed to this virus and have no immunity.

Data compiled by The Post shows at least 107,000 deaths from the coronavirus as of Friday.

The worst weeks for coronavirus deaths were in early April.

The heterogenous nature of the epidemic in the United States reveals itself in South Carolina.

Carr, a professor of emergency medicine and public health sciences at the Medical University of South Carolina.

Sweat, director of the Center for Global Health at the Medical University of South Carolina, has been maintaining models tracking the virus’s spread and calls the localized hot spots a series of “microepidemics.” His research shows that, as the state has lifted restrictions, people have begun to move around nearly as much as they did before the coronavirus arrived.

But positive test rates in South Carolina have been going up even as testing has expanded.

Coronavirus maps: Cases and deaths in the U.S

| Cases and deaths worldwide | Which states are reopening