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R-0 may be the most important scientific term you’ve never heard of when it comes to stopping the coronavirus pandemic.

USA TODAY

Jacqui Slay, a 38-year-old stay-at-home mom of Myrtle Beach, South Carolina, planned her family trip to Disney World in Florida a year ago. One month away from her scheduled tour in early September, she said she wasn’t sure if she would go, citing recent record-high COVID-19 cases in Florida.

“We’re kind of up in the air about it,” she said. 

Slay is one of many Americans who faces a travel dilemma during the COVID-19 pandemic: Is