The coronavirus continued to affect the region yesterday as new cases were announced, events were canceled, and thousands of students and staff were told not to come to school today. Follow live coverage at Inquirer.com/Coronavirus.

The coronavirus’ impact on the region grew Monday. New cases emerged. Dozens of area schools told tens of thousands of students and staff to stay home. Universities, businesses, and trade groups canceled events and classes.

As of this morning, Pennsylvania had 10 announced cases, with three new cases announced yesterday. Pennsylvania’s secretary of health said more cases are expected to be confirmed in the coming days. New Jersey identified five new patients yesterday, bringing its total to 11 and leading Gov. Phil Murphy to declare a state of emergency and a public health emergency.

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When Donald Trump visited Erie in 2016, he blasted Democrats for ruining the region’s manufacturing sector. He pledged to reverse the decay. But now, more than three years into Trump’s presidency, Erie County has fewer manufacturing jobs than when Trump took office and the smallest number since 2010.

Trump’s inability to change the trajectory of manufacturing goes beyond Pennsylvania’s northwest corner. And the president’s ability to hold on to Pennsylvania, and states such as Michigan and Wisconsin, could depend on maintaining the support he got from blue-collar voters.

What you need to know today

Through your eyes | #OurPhilly

Kicking back in the sun is something I really missed over the winter. Thanks for the pic, @lauren.loves.philly.

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That’s interesting

Opinions

“What might have been acceptable in Kensington is a bridge too far in South Philly.” — writes Linda Kerns, a lawyer and co-founder of the site Broad + Liberty, about where plans for a supervised injection site go from here.

What we’re reading

Your Daily Dose of | Micro Toys

Even as a kid growing up in Northeast Philly, Alan Dorfman was always interested in the latest toy fads, be it Silly Putty or yo-yos. And now, the Langhorne native gets to work on such toys as the Super Soaker or Etch a Sketch. Except that Dorfman’s versions are extremely small — such as Hot Wheels cars that can park on a postage stamp.