To be considered an outbreak, a foodborne illness must; Include at least six people Involve more than one food Be confirmed by laboratory analysis Occur over multiple days

## Step 1<br />The problem is asking us to identify the correct condition that must be met for a foodborne illness to be considered an outbreak. The options provided are:<br />- Include at least six people<br />- Involve more than one food<br />- Be confirmed by laboratory analysis<br />- Occur over multiple days<br /><br />## Step 2<br />We need to understand what an outbreak is. In the context of foodborne illnesses, an outbreak is defined as an occurrence of two or more cases of a similar illness resulting from the ingestion of a common food.<br /><br />## Step 3<br />Now, let's analyze each option:<br />- "Include at least six people": This is not a necessary condition for an outbreak. An outbreak can occur with fewer than six people.<br />- "Involve more than one food": This is also not a necessary condition. An outbreak can occur from a single type of food.<br />- "Be confirmed by laboratory analysis": This is a necessary condition. Laboratory analysis is used to confirm that the illness is indeed foodborne and to identify the specific pathogen causing the illness.<br />- "Occur over multiple days": This is not a necessary condition. An outbreak can occur in a single day.