It’s no secret that you can often spot a few signs of cancer in your mouth.
If you have a cold or a cough, for example, the bacteria in your saliva will probably be there, but if you don’t, it’s likely that your toothbrush is causing the problem.
But for some people, it can be harder to spot.
In one case, a British man was diagnosed with oral cancer in October 2017.
While he was in the hospital recovering from the infection, he was treated for a cold.
He developed a small but persistent infection that had spread to his gums, teeth and tongue.
The infection eventually spread to other parts of his body, including his heart, lungs, liver and intestines.
The doctors diagnosed him with a form of oral cancer called oropharyngeal carcinoma, or OCC, and he underwent a successful treatment, in which the bacteria were removed from his gingiva and replaced with healthy bacteria from his saliva.
The man has since been released from the hospital.
In an article on the oral cancer subreddit, one user pointed out that the infection is often associated with the flu.
But a spokesperson for Oral Cancer UK, which provides support for people diagnosed with OCC in England, said that there are some people who have been diagnosed with the disease who haven’t had any flu symptoms at all, so it could be a common flu bug that leads to the infection.
The spokesperson told the BBC that it is very rare for someone to have a flu-like illness while in the UK.
The NHS has a dedicated helpline for people to call for information about their oral cancer diagnosis.