Question about 'ontologizing' a survey?

Hi all,

Random question really...

If I were to ask you to 'mark up' this questionnaire with ontology terms,
how would you do it:
https://alama.org.uk/covid-19-medical-risk-assessment/

I'm guessing the questions could be 'tagged' with a disease ontology and
the answers with a phenotype ontology that includes either numerical values
and units or categorical answers.

Which ontologies would you choose to annotate these questions and answers?

This is for a student project.


Many thanks,
Dan.