Yes it can. It is called precipitate vomiting.
Actually, when the dreaded Norwalk virus was first identified (back when it was still called winter vomiting disease), it was noted that precipitate vomiting was one of the most common symptoms. In the Vomiting FAQ (see the URL in my signature), I quote from an early medical journal article:
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The chief symptom was that of vomiting, which occurred in 42 of the 52 cases. The sickness came on quite suddenly, so that several of the girls were sick wherever they happened to be in the school or on grounds; but a great many, having gone to bed apparently well, woke up in the morning and were sick before they could get out of bed. (Reginald Miller & Martin Raven, "Epidemic Nausea and Vomiting," British Medical Journal 1: 1242-1244 (1936))</BLOCKQUOTE>
To learn more about emetophobia, see
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