"If your child gets infected, there's no guarantee that that child is protected against future infection," Dr. Jeffrey Kahn said.
A self-quarantine could potentially be avoided in some states for those who show proof of a negative test result.
The U.S. is the worst-hit country in the world, with more than 3.5 million confirmed cases and over 138,000 recorded deaths.
There have been 10 cases of the disorder reported so far, with two in the U.S.
New infections in Georgia spiked by nearly 30 percent over the past two weeks.
The man reportedly traveled across the country for the video shoot, including in the Yamaguchi Prefecture.
The study involved over 3,000 men who answered questions including about how often they had sex, how regularly they masturbated, and how long and often they watched porn.
A scientist who didn't work on the study told Newsweek it is "an impressive and important step forward."
Researchers looked at data on the Chinese city of Wuhan, the original epicentre of the COVID-19 pandemic, for their study.
Bed shortages were reported at intensive care units in several regions, including San Joaquin County.
Eight hospitals in Miami-Dade County were reported to have hit full ICU bed capacity.
"We are writing to underscore the vast importance of human challenge trials as a method to help develop vaccines," an open letter signed by more than 120 scientists read.
As coronavirus cases soar, the odds of schools opening in the fall is low. Parents are bracing with having the kids home another few months--or longer.
The study involved almost 500 people in hard-hit Italy.
The FDA began publishing a small list in June, and it has ballooned over the last 3-4 weeks, with most of the products containing methanol.
Denial of a medical exemption means no salary for Delle Donne, who did not want her judgment based on her MVP status from last season. She takes 64 pills a day to treat her disease.
In the past few weeks, states in the south and west have experienced surges in cases
Scientists have conducted the biggest ever study on the condition.
Several state health guidelines were reportedly breached at the rally held at a bar in Pasadena.
The vaccine to protect against COVID-19 will enter a Phase 3 efficacy trial at the end of July.
There have been more than 13.3 million worldwide confirmed cases of COVID-19 during the current pandemic, and over 578,000 recorded deaths.
Robert Redfield also said the outbreak could be brought under control if everyone wore masks.