Global Initiative for asthma guidelines were used to assess the severity of asthma exacerbations.
用全球哮喘防治创议的指导原则评估哮喘恶化的程度。
There are some reports of asthma exacerbations but is more likely due to the vapor flavor and not the nicotine.
有一些关于哮喘急性加重的报告，但这更像与烟雾有关，而不是尼古丁。
None of the assessed respiratory pathogens were associated with the severity of asthma exacerbations, the researchers note.
研究者指出，呼吸道病原体与哮喘恶化的程度无关。
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