Translations:Advanced Field Epi:Manual 1 - Disease Investigation/286/en
| style="background-color:#ffffff;border:0.5pt solid #00000a;padding-top:0cm;padding-bottom:0cm;padding-left:0.199cm;padding-right:0.191cm;"| * Unsuited to investigating rare diseases
- Less useful for acute diseases
- May be difficult to control potential confounders
- Incidence cannot be estimated
- May be difficult to determine causality
- May be problems with reliability of data/recall for historical data