No universal playbook for virus testing in pro sports
A worker takes the temperature of a person arriving at Darlington Raceway before the Real Heroes 400 NASCAR Cup Series auto race Sunday, May 17, 2020, in Darlington, S.C. NASCAR, which has been idle since March 8 because of the coronavirus pandemic, makes its return at the track Sunday. (AP Photo/Brynn Anderson)

A worker takes the temperature of a person arriving at Darlington Raceway before the Real Heroes 400 NASCAR Cup Series auto race Sunday, May 17, 2020, in Darlington, S.C. NASCAR, which has been idle since March 8 because of the coronavirus pandemic, makes its return at the track Sunday. (AP Photo/Brynn Anderson)

May. 17, 2020 11:06 AM EDT
In this Saturday, May 9, 2020 photo, photographer Jason Vinlove, right, gets tested for COVID-19 antibodies before covering UFC 249 mixed martial arts event in Jacksonville, Fla. There is no universal playbook for coronavirus testing in professional sports. Protocols and procedures, guidelines and handbooks, they could be as different as the rulebooks that govern leagues around the world. UFC performed nasal swabs and/or blood tests for roughly 1,200 people on site during its weeklong stay in Jacksonville, part of the mixed martial arts behemoth’s health and safety protocols. (AP Photo/John Raoux)

In this Saturday, May 9, 2020 photo, photographer Jason Vinlove, right, gets tested for COVID-19 antibodies before covering UFC 249 mixed martial arts event in Jacksonville, Fla. There is no universal playbook for coronavirus testing in professional sports. Protocols and procedures, guidelines and handbooks, they could be as different as the rulebooks that govern leagues around the world. UFC performed nasal swabs and/or blood tests for roughly 1,200 people on site during its weeklong stay in Jacksonville, part of the mixed martial arts behemoth’s health and safety protocols. (AP Photo/John Raoux)

May. 19, 2020 02:16 PM EDT
Cristiano Ronaldo leaves the Juventus sport center after his first training, in Turin, Italy, May 19, 2020. Cristiano Ronaldo has reported back to Juventus’ training center after a 10-week absence. The five-time Ballon d’Or winner showed up for medical tests with the Serie A leader Tuesday, May 19, 2020. Ronaldo observed a two-week isolation period at his home in Turin after spending the lockdown period in his native Portugal. (Fabio Ferrari/LaPresse via AP)

Cristiano Ronaldo leaves the Juventus sport center after his first training, in Turin, Italy, May 19, 2020. Cristiano Ronaldo has reported back to Juventus’ training center after a 10-week absence. The five-time Ballon d’Or winner showed up for medical tests with the Serie A leader Tuesday, May 19, 2020. Ronaldo observed a two-week isolation period at his home in Turin after spending the lockdown period in his native Portugal. (Fabio Ferrari/LaPresse via AP)

May. 19, 2020 07:04 AM EDT
Workers take the temperatures of people arriving at Darlington Raceway before the Real Heroes 400 NASCAR Cup Series auto race Sunday, May 17, 2020, in Darlington, S.C. NASCAR, which has been idle since March 8 because of the coronavirus pandemic, makes its return at the track Sunday. (AP Photo/Brynn Anderson)

Workers take the temperatures of people arriving at Darlington Raceway before the Real Heroes 400 NASCAR Cup Series auto race Sunday, May 17, 2020, in Darlington, S.C. NASCAR, which has been idle since March 8 because of the coronavirus pandemic, makes its return at the track Sunday. (AP Photo/Brynn Anderson)

May. 17, 2020 11:08 AM EDT
A sign directs people to a screening station outside Darlington Raceway Sunday, May 17, 2020, in Darlington, S.C. NASCAR, which has been idle since March 8 because of the coronavirus pandemic, makes its return with the Real Heroes 400 Nascar Cup Series auto race Sunday. (AP Photo/Brynn Anderson)

A sign directs people to a screening station outside Darlington Raceway Sunday, May 17, 2020, in Darlington, S.C. NASCAR, which has been idle since March 8 because of the coronavirus pandemic, makes its return with the Real Heroes 400 Nascar Cup Series auto race Sunday. (AP Photo/Brynn Anderson)

May. 17, 2020 10:11 AM EDT
Driver Ryan Newman gets his temperature taken as he arrives at Darlington Raceway before the Real Heroes 400 NASCAR Cup Series auto race Sunday, May 17, 2020, in Darlington, S.C. NASCAR, which has been idle for 10 weeks because of the coronavirus pandemic, makes its return at the track Sunday. (AP Photo/Jenna Fryer)

Driver Ryan Newman gets his temperature taken as he arrives at Darlington Raceway before the Real Heroes 400 NASCAR Cup Series auto race Sunday, May 17, 2020, in Darlington, S.C. NASCAR, which has been idle for 10 weeks because of the coronavirus pandemic, makes its return at the track Sunday. (AP Photo/Jenna Fryer)

May. 17, 2020 01:03 PM EDT