A long and wonderful investigation by the US Centers for Disease Control and Control (CDC), showing the importance of wearing a muzzle and its great role in preventing infection.

The investigation examines the role of hairdressing centers in spreading infection, two hairdressers working in a salon, and they continued to work for several days, despite being infected with the Corona virus, and after monitoring and follow-up, it became clear that the two employees dealt with 139 clients, directly.

But the result was surprising, as none of the 139 clients contracted the Corona virus, and none of them showed symptoms, despite their close contact with the two workers.

After investigations, the center reached several information, the most important of which is that the average time each customer spent with the employee was about 15 minutes. And that the two employees, the first and second, adhered to the state’s decisions for prevention, and they wore the muzzle throughout the period of their dealings with customers, and the customers, in turn, during their stay in the salon, committed themselves to wearing the muzzle, and the salon also adhered to a simple work ratio to avoid crowding.

Symptoms of infection appeared on the first employee, but she continued to work, and on the fifth day, she was advised to self-isolate, however, she continued to work and did a PCR smear to show the result on the eighth day that she was infected with the virus, and then self-isolates.

On the third day, the same symptoms appeared on the second employee and she conducted the analysis on the eighth day, and isolated herself, so that the result appeared positive on the tenth day.

Investigations showed that during their infection with the virus, the first employee dealt with customers for 8 days, and the second for 5 days, and during all transactions, the two employees committed to wearing the muzzle, but during the rest period we removed it, and this may explain that the first employee transmitted the infection to the second employee.

The 139 customers were identified, and they were told to self-isolate for a period of 14 days, and the state health authorities monitored their cases daily, to ensure that they showed symptoms, but they never appeared.

After 5 days, 139 customers were asked to take a PCR swab test, 72 people agreed to take the swab and 67 refused, and all 72 came back negative.

However, by investigating the families of the two employees by testing 4 family members of the first employee, with whom she lives constantly, husband, daughter, son-in-law and their roommate, all showed a positive result. Also, two members of the family of the second employee were tested, and they showed a negative result, and the employee said that, in general, she had little contact with them.