Key rotation is crucial for several reasons. Firstly, it helps to reduce systematic biases that can arise from consistently using the same tools, locations, or personnel. This is particularly important in ensuring that the results of a study are generalizable and not skewed by local anomalies. Secondly, key rotation can improve the [accuracy](https://) and reliability of [surveillance systems](https://) by ensuring that data is collected in a diverse and comprehensive manner. Lastly, it helps in maintaining the [confidentiality](https://) and security of sensitive [health data](https://).
