There is no individual health factor per reserve, the reserve factor comes from the whole collaterals against debt, here the [formula](https://docs.aave.com/risk/asset-risk/risk-parameters#health-factor); You can use `getuseraccountdata `to find an individual health factor [here ](https://docs.aave.com/developers/core-contracts/pool#getuseraccountdata)or using the sdk aave-utilities [here](https://github.com/aave/aave-utilities/tree/master#user-data);