Hello 🙂 . Yes you need to upload polio certificate in your immiaccount (there will be a part where it asks you about your health/medical record).
Also, yes you need to submit your family composition certificate. Even if it's a family of just 2 🙂
Hope it helps 🙂
Just a silly question to ask.
Immigration consider 186 and 187 applications as a same?
Even they have different scrutiny levels but in our immi accounts it always shows employer sponsored visa 186, 187 either we applied for 186 or 187.