Jurgen Klopp admits he is surprised more people in England are not wearing face masks as the country eases its way out of lockdown.
Liverpool, along with the 19 other top flight clubs, are back training as they prepare for the Premier League's start on June 17.
Guidelines are being adhered to although Project Restart recently got the green light to allow full contact training last week.
Nevertheless clubs are putting measures in place to ensure player safety which has seen Klopp call Melwood a "100 per cent secure environment".
But he is surprised the rest of society are not being more vigilant after claiming humans can be their "own biggest enemy".
"Yes it feels 100 percent a secure environment, but we can never be sure that it will be and that there will be no infections," he told BBC 5 Live .
"We still have a normal life, the boys are massively disciplined. [It has been] 11 weeks already, which for people in this age is a challenge.
"For all of us it’s a challenge, but for [the players] especially. We go to petrol stations, we need fuel, we need food, stuff like this.
"We wear face masks, which I don’t understand why not everyone in England, especially in close areas, wear face masks and gloves. I don’t understand that, it helped in Germany a lot. I’m not an expert but it helped there a lot.
"We’ve told the boys, if you go wherever I want them to wear a face mask and gloves, so from their point of view nothing can really happen.
"Humans are the most risk to humans, we are our own biggest enemy sometimes, so we have to stay disciplined, and we will."
