It's hard to tell by looking at their firewood collection habits. If she follows scent trails they don't super smell like orcs?

Weird! Maybe it will be more obvious once she finds their camp.

She can track that down. There's a sleeping human and another one who is tending a fire under a turtle shell full of gruel.

Uh.... What?? She is pretty sure that someone would have mentioned if there were other humans. She... is going to watch for a bit. Maybe nab one of them if she can get them alone. 

Well, the sleeping one probably won't notice if she nabs the cook. Looks pretty out of it, maybe feverish. There are some breathing sounds inside some lean-tos but they don't have visibility either.

The soup in the shell is being stirred with a stick.

Well that won't do at all!

Bonesaw will march right in and begin doing a check-up on the sleeping one.

The stirring human notices that and leaps up and says something in Not Orcish, brandishing the stick.

Bonesaw shushes her! Her friend is sleeping after all.

This will get Bonesaw inconsiderately hit with the stick and shouted at!

It will not get her hit with a stick unless they are quite a bit faster at hitting people with sticks than a baseline human! She can even do the check-up while dodging.

That alarms the person quite a bit and the shouting continues, rousing nearby other humans who come to see what the commotion is and surround their sleeping sick friend to make Bonesaw's life inconvenient.

Bonesaw has a vial on her for in case of orcs and she'll only use a bit instead of the full thing given that these are humans but regardless they should all be sleeping soon, unless they are very good at holding their breath.

They didn't even know they should be trying! They pass out.

Very considerate of them. 

Finally she can do a proper check-up on the sick one! How is her patient.

He has a flu. Also was not holding his breath so there's that on top of the flu.

Bonesaw can give him a a tiny dose of the no-sleep drug she gave Beka when they fled here, that should counteract the sedative and also wake him up.

He wakes up, frowns at her, looks around and startles violently at the sight of all his tribe members lying on the ground, and tries to get up and run away.

She will hold him firmly in place. 

"Say 'Aaaaaah'" she instructs, demonstrating for him.

He does not understand her and his wild-eyed fright does not involve saying aaaaah. It's more of a whining "hnggg" sort of noise.

Well, he'll have to open his mouth if he can't breath otherwise, so she firmly grabs his nose and scrunches it till the cartilage collapses.

Success! He is panting for air!

Goody! That'll give her the opening to inject some things into his tonsils that'll numb his symptoms for the next few hours.

You'd think he wasn't grateful for the free medical care at all the way he's having a panic attack.

Rude but not diagnostically relevant! She can set-up a blood transfusion with her secondary circulatory system to make sure he has better antibodies, even if he's moving around a bit while she does it.

He is actually trying pretty hard to flop-crawl away from her but maybe not enough to sabotage his medical outcomes?