1 A standard teeth cleaning by a dental hygienist can cost $75-$200, depending on the dentist's office and local rates. 2  CostHelper readers report paying $80-$175, or an average cost of $127 for just a routine cleaning.3  Frequently a teeth cleaning appointment will also include dental X-rays and an exam by the dentist. Dental insurance typically covers 100% of the cost of a teeth cleaning once or twice a year as necessary preventive care, but not more often -- and some plans may have a maximum amount they will pay for a cleaning, which can be less than what the dentist charges.
25 million people died in just under five years between 1347 and 1352. Estimated population of Europe from 1000 to 1352. In the early 1330s an outbreak of deadly bubonic plague occurred in China. The bubonic plague mainly affects rodents, but fleas can transmit the disease to people.
According to the CDC, an average of 7 human plague cases are reported in the U.S. each year. Still, despite its rarity and relatively high survival rate, the disease, which is caused by the bacterium Yersina pestis, must be taken seriously. If untreated, plague can cause serious illness and death. Plague symptoms include fever, headache, chills, weakness and swollen lymph nodes.