“The fourth wave of Covid-19 is expected to peak around 10 October, after which there will be a slight dip,” virologist Prof. Radka Argirova said for the BNR.

“With the Delta variant people get infected more quickly, the disease itself resembles the flu, with a mild headache and a fever, there isn’t always a cough even, and that is why people tend not to go to see a doctor,” she added.

“The focus must be on control. There is no point putting restrictions down on paper, they are not observed in the least in this country,” Prof. Argirova said. In her words the children who suffer from the isolation should attend school in person as much as that is possible, not study online.