Inheritance or your genes. If anyone in your family has a chronic disease you may be at risk of getting that disease.
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Answer:
Microbiological hazards
Explanation:
The vomiting might probably be because of irritation (some ingredients that he isn't comparable with) or food poisoning which could be a result of contamination. Whatsoever the case might be, handling of the ice cream might be posed with hazardous which are physical, chemical, allergens and microbiological hazards, the likelihood of the microbiological hazards is higher and the commonest in such a situation.
