The CDC is particularly concerned about measles transmission at the World Cup given the extremely contagious nature of the virus and the fact that very large numbers of people are in close contact with one another.

In addition, there is concern that people traveling to a western European country like Germany may not take the precautions to prevent disease that they would when traveling to other areas of the world.

Because of these concerns CDC recommends that:

--People traveling to the World Cup should be aware of their measles vaccination history and take steps if needed to make sure they are protected.

--Any measles symptoms (raised rash on the face that spreads to the extremities, red eyes, etc.) after return from the World Cup should prompt travelers to see a healthcare provider.

--People with measles symptoms should avoid contact with others to reduce the risk of disease transmission.

--Physicians evaluating patients with a fever should inquire about vaccination history and any recent travel.

"Right now, we plan to use it to fix fractured or diseased teeth, as well as asymmetric jawbones, but it may also help hockey players or children who had their tooth knocked out," Jie Chen, an engineering professor and nano-circuit design expert, told AFP.

Chen helped create the tiny ultrasound machine that gently massages gums and stimulates tooth growth from the root once inserted into a person's mouth, mounted on braces or a removable plastic crown.

The wireless device, smaller than a pea, must be activated for 20 minutes each day for four months to stimulate growth, he said.

It can also stimulate jawbone growth to fix a person's crooked smile and may eventually allow people to grow taller by stimulating bone growth, Chen said.

Tarek El-Bialy, a new member of the university's dentistry faculty, first tested the low-intensity pulsed ultrasound treatment to repair dental tissue in rabbits in the late 1990s.

His research was published in the American Journal of Orthodontics and Dentofacial Orthopedics and later presented at the World Federation of Orthodontics in Paris in September 2005.

With the help of Chen and Ying Tsui, another engineering professor, the initial massive handheld device was shrunk to fit inside a person's mouth.

It is still at the prototype stage, but the trio expects to commercialize it within two years, Chen said.

The bigger version has already received approvals from American and Canadian regulatory bodies, he noted.

But when the lid was lifted off the last coffin on Wednesday, archeologists found woven flowers and royal necklaces thought to be 3,000 years old.

The embalming materials could help reveal what plants and herbs the ancient Egyptians used, said chief curator Nadia Lokma of the Cairo Museum.

There are also signs the tomb, called KV 63, is linked to Tut, said Zahi Hawas, head of Egypt's Supreme Council of Antiquities.

The tomb has elements of Aten, the sun god in ancient Egyptian mythology, said Egyptologist Otto Schaden of the University of Memphis, who uncovered the tomb.

Coffin lids are coverered in resin, obscuring some hieroglyphic inscriptions, said Hawas.

Researchers hope the hieroglyphics will help them to identify for whom the coffins were built.

The six coffins, which had been opened previously, contained mostly pottery shards and what appear to be feathery pillows.

Scientists found the foreign remains among 121 shattered human skeletons in a tomb about 500 meters from the famous museum housing the life-sized terracotta warriors and their horses and weapons.

The discovery means contacts between the people in east Asia and those in what is now central Asia began a century earlier than the previously supposed Han Dynasty (206 BC-220 AD) period, said Duan Qingbo, head of the Qinshihuang Mausoleum Excavation Team under the Shaanxi Provincial Institute of Cultural Heritage.

Scientists collected bone fragments from 50 sets of remains in the laborers' tomb that was unearthed in 2003 and from these extracted 15 DNA samples.

Most of the bodies were males aged from 15 to 55, Duan said.

Tan Jingze, an associate professor at Shanghai-based Fudan University, which conducted the DNA tests, said one sample had genetic features commonly associated with the Parsi in India and Pakistan, the Kurds in Turkmenistan and the Persians in Iran.

The foreigner was a man who died in his 20s and was ethnologically a European, Tan said.

He might have been captured in the north where nomads roamed between east and west Asia and been sent to work at the burial ground, she said.

"It's an inspiring discovery, but we're not sure if there are more foreigners involved in the construction of the mausoleum," she said.

Duan said scientists would find it difficult to collect more DNA samples from the tomb as it had suffered serious water erosion and the skeletons, which have been piled in layers, were so badly preserved that any movement would destroy them.