Young Americans continue to be the most likely to use social networks, according to the survey, with 90 percent of those 18 to 29 reporting that they use at least one social site. However, growth in usage by young adults started tapering off in 2010, while use by older people has surged.
A carbon monoxide blood test is used to detect poisoning from breathing carbon monoxide. You might have this test if you have been exposed to the gas or if you have unexplained symptoms, such as: 1  Headache, dizziness, or vision problems.  Nausea or vomiting.
The symptoms of carbon monoxide poisoning aren't always obvious, particularly during low-level exposure. A tension-type headache is the most common symptom of mild carbon monoxide poisoning. Other symptoms include: dizziness. nausea (feeling sick) and vomiting. tiredness and confusion. stomach pain. shortness of breath and difficulty breathing.