If a carbon monoxide alarm goes off, or if everyone in a room suddenly has headaches, nausea, or dizziness, get outside first and then call for help
If the alarm sounds, or if everyone in a room simultaneously experiences headaches, nausea, or dizziness, move everyone outdoors first, then call for help. Do not stay inside to investigate the cause, and do not go back to turn off valves. Symptoms resemble a cold; 'feeling better once outside' is the strongest indicator. In China, 2018 people were reported to have died from carbon monoxide poisoning in 11523, with the highest numbers occurring in winter, mostly while at home.
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The China CDC's cause-of-death surveillance system reported 11523 deaths from carbon monoxide poisoning in 201…
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The China CDC's cause-of-death surveillance system reported 11523 deaths from carbon monoxide poisoning in 2018 year. The highest numbers were in 1 month (2845 cases), 2 month (2321 cases), and 12 month (2010 cases). During these three months in winter, those who died at home accounted for 66% to 73%. These are numbers reported by the system, not estimates based on the national population. In the United States, more than 400 people die every year from accidental carbon monoxide poisoning unrelated to fires. More than 10 ten thousand people enter the emergency room, and more than 1.4 ten thousand people are hospitalized.
You J, Liu J, Zhou M (2020). Number of Deaths due to Carbon Monoxide Poisoning by Month and by Place of Death — China, 2018. China CDC Weekly 2(2):32：「In 2018, there were 11,523 deaths caused by carbon monoxide poisoning reported in China」. https://doi.org/10.46234/ccdcw2020.008；美国疾病控制与预防中心. 一氧化碳中毒：「More than 400 Americans die from unintentional CO poisoning not linked to fires」「More than 100,000 visit an emergency department」「More than 14,000 are hospitalized」，常见症状「headache, dizziness, weakness, upset stomach, vomiting, chest pain, and confusion」. https://www.cdc.gov/carbon-monoxide/about/index.html；美国消费品安全委员会. 一氧化碳信息中心：「If you suspect CO poisoning, get outside to fresh air immediately, and then call 911」. https://www.cpsc.gov/Safety-Education/Safety-Education-Centers/Carbon-Monoxide-Information-Center
Open source linkSymptoms resemble a cold or being intoxicated. The strongest indicator is when everyone in a room feels unwell together and improves upon going outside. Do not stay inside to investigate the cause, and do not go back to turn off valves; get people out first, then call for help. For instructions on how to install an alarm, see Section 1, Article 3.