"I'll send for a few of our own, then.  Most healing sorceries aren't especially good for the detection or prevention of illnesses, so I'll ask for a mundane healer with a specialty."

He goes and does this.  There are a few servants waiting outside of the room who can be co-opted for that.  He also asks them to bring tea, having failed to do so earlier.  

Tea is appreciated! As is diplomacy more in the area of what she was actually trained for, though she doesn't express this later sentiment out loud.

The tea shows up first.  The pot and strainer system are different, though the tea itself is similar enough.  Sugar and cream are provided in matching small pitchers.  Everything other than the tray itself is made entirely of clear glass etched with elaborate faceted flower patterns.  Even the stirrers are glass, rather than metal spoons.  Along with the tea are dried slices of fruit - apparently, the local accompanying food associated with tea. 

"Dishes used to serve important guests are traditionally made from clear glass, on Tle," Elizara mentions, making small talk while Ezure focuses on preparing the tea.  "It symbolizes clear communication."  It also stops people from getting the cream and sugar pitchers confused, and a few other things, though she's not going to go into exhaustive detail on the reasons.

"A good symbolism. We generally have traditionally made ceramics - if you like the people you're dealing with and they don't outrank you, you use the same cups you would among your own family. If they outrank you, you generally use delicate porcelain - it's hard to make, and therefore expensive."

"We use a lot of glass in general - it's popular among the upper class and anyone who can afford to emulate them.  What material do you use for people you don't like, who don't outrank you?"

The tea is poured with a flourish.  There are plenty of cups for everyone, including the guards, translator, and the Mika medics whenever they arrive.  He gestures at the teapot to the guards questioningly; some cultures don't like their guards drinking tea on the clock, and he's not sure which category these fall into.  

She shakes her head a bit. 

"Mostly cheaper ceramics, or things with flaws or cracks in them. Ideally subtly so."

After a while, the doors open and admit two men into the room.  One is wearing the local asymmetric clothing in orange and white.  The design is practical, not fancy like the nobles or the sorcerer-priest.  A series of three symbols flows off of one shoulder, surrounded by lines indicating high rank.  The other, very tall and broad, wears a brown traveller's robe, symmetrical other than the thick strap across his chest holding his bag.  In addition to the height, he looks clearly foreign.  

"I'm Dr. Milio," says the orange-dressed man.  "In charge of studying and managing infectious diseases from travellers for Mika."

"I'm Ara'Vine, Champion of Diamondeye," the tall one says.  "A mage with a healing mage-power.  I've spent the last few decades creating medicinal plants and vaccines in Mesasoth, to the north, and have only recently arrived in Mika.  I asked to come along because I suspect I can be of some help in this situation." 

"Good to meet you. I'm Senju Tsunade, Konoha's leader and also foremost medical expert. My primary focus is in trauma and surgery, but I've been branching out over the years." She introduces the medics she brought with her - more focused on disease, vaccination, and first-line treatment during outbreaks.

Tea is poured (for Dr. Milio; Ara'Vine declines politely but takes a slice of dried fruit), the two newcomers are informed of what has already been discussed, then they can begin to compare the current state of each world's medical knowledge.

On Tle, germ theory has been known for over a thousand years.  Vaccination in general is widespread, though newer, and only available for some of the slower-to-adapt diseases.  Most other medicines are derived from plants or fungi - usually god-or-magic-made ones, as the naturally evolved plants are too inconsistent - with many hospitals still growing their own locally.  Centralized farms creating compact, shelf-stable pills is coming along in the far north but hasn't caught on everywhere yet.  They have lots of antibiotics, treatment for things such as high blood pressure, and a better-than-nothing-but-not-flawless birth control, but are lacking good treatments for mental issues or decent painkillers.  

Healing potions and magical healing exist, but are too rare for the average person to obtain reliably.  This has likely caused some research funding issues, as the very wealthy don't have a personal stake in technology-based medical treatments which can be scaled.  Many hospitals are funded by churches, with different gods preferring different systems and specialties.  This wing of the Quercus main estate has been cordoned off for holding people who are potentially contagious, with servants who know quarantine procedures.  

They've had a lot of disruptions to science, especially medical science, over the past few hundred years. The last few decades have seen the most rapid advances in understanding in practically every field of medicine since the Imperial age centuries ago. The cornerstone of their medical science is usually magical healing, with mundane techniques being developed from those - chakra-based healing offers an incredibly in-depth capability for diagnosis and monitoring, and you can't safely use chakra to heal people without some intense medical training. They have the most knowledge of anatomy and of treating trauma, but chakra can be used as a potent disinfectant. Chakra can also be used to develop fairly custom poisons - including ones that will leave human cells and beneficial microbes alone while killing unwanted strains, and those can usually then be more widely distributed. This is a bit less effective on viruses; they're working on speeding up vaccine development and on finding ways to improve immune systems. They have drugs that can boost most of the body's systems including immunity but risk causing serious fever, and a pill that helps replenish blood loss, and near perfect pain killers - chakra-based pain killing techniques have fewer side effects and are less prone to people developing immunities or addictions than chemical pain killers. They can treat cancer, though operations on brain cancers are still risky. Tsunade's been working on ways to regrow affected neurons, both for brain cancer and as a treatment for traumatic brain injuries. They have an effectively flawless chakra based reversible sterilization - which is fairly recent, and was a fairly big priority culturally - and less thorough one-off options for birth control, both based on barriers and on medicines.

Medics trained in chakra usually are assigned to the front lines of major infection outbreaks, since any medic-nin worth the name can prevent themselves from becoming infected or even being a carrier, making them invaluable for getting highly infectious diseases under control. A good medic-nin can entirely cure someone of severe forms of most of the known potential pandemics within an hour. They still get disease outbreaks - medics of that caliber are rare and expensive to train, and not every nation has reliable medical programs or trusts other nations enough to import medics in an emergency.

Shinobi are the main leaders in medicine, largely because of chakra. The daimyo - their leaders - usually give shinobi a general fund for medical development, and there's a standing amount of budget set aside for a fairly large mobile medical corps in Fire Nation. Their daimyo, though, is unusually astute and unusually capable of recognizing that a healthy populace is a productive populace, and several nations don't have those luxuries. (She leaves off mentioning that she also fought with the daimyo for that medical corps to be established; no sense bragging, or casting her own leader in a bad light.)

"It sounds like chakra can be used to do many of the same things my mage-power can do."  He sounds envious of a world where he's not the sole bottleneck for those.  "I'd be curious to discover the differences between them.  Mine is very easy to use for direct healing of the user and detecting the state of the body, harder to use for anything more advanced including the creation of scalable medicines."

"Chakra's most easily used for crude manipulation of the world - healing in general's such a difficult application that the difference between closing a cut and reversing major trauma is smaller than the difference between either and setting things on fire."

"I'm curious to hear the difference between your magic's diagnostic vision and mine."

He hands over a loose uncut diamond about the size of a fingernail.  "This has thirty seconds of charge in it.  That's enough to look, though not to heal more than a small cut."

"If you wanted to test vision directly, you'd want to hand that to someone with a relevant bloodline - my diagnostic techniques would run more on feel."

The translator speaks up, speaking for himself for the first time in a while.  "Sight-based words are the ones most commonly used for magical senses of all kind.  'Sense' probably would have been more accurate.  I apologize if that had been rendered unclearly?" he glances at Ara'Vine questioningly.  His words are understandable by anyone, so the locals would have heard his side of the exchange, if not Tsunade's original answer.  

"It's more akin to proprioception than eyes," he clarifies, which then gets translated.  

"Sounds more like our thing then, yes - we usually describe magical senses as 'feelings' here, even when they're based in sight. I'd be interested in trying. How do I activate this...?"

"It should feel like something that can be activated at will."

As soon as she touches the diamond, there's a knowledge that comes with it about the magic inside.  That it allows the user to heal and alter one's own body, and gives a sense that can let the user know what can be changed.  That there isn't much there, and that the chargestone is something that can be turned on or off at will.  The magic feels like it wants to be used to heal in particular.  

She activates it.

The new sense takes up almost all of her awareness as a flood of new information becomes noticable, keeping only barely within her mind's ability to contain.  

Trillions of cells moving as one, or around each other.  Each blood cell is noticable as it travels, and she can feel each muscle as her heart beats and she breathes.  Saliva glands, hair follicles, the entire digestive system, every other system all at once.  Attempting to focus on a single part doesn't slow the torrent, which opens up like a fractal to reveal more detailed knowledge of the smaller section as the unfocused parts clear up room for them.  Cell nuclei, mitochondria, cell walls and their features, DNA itself.  All of the information is jumbled chaotically, millions of facts but no organization to them, focused more on the literal actions and locations as they're happening than how they're meant to help the whole.

Tiny injuries or accumulated damage draw attention like moving objects on a still field does for sight.  Particles of smoke from nearby fireplaces, and other such small things.  The magic is aware of them, and she can feel it want to heal them almost like a dog pulling on a leash - more of an action to hold it than let it heal.  The intuition comes that the magic will act of its own will with anything it sees as healing, but any other changes need to be done manually and with no assistance.  There is also a strange block around her brain - the will of the magic itself can heal injuries there, but it can't be changed manually.

The sense can only detect physical things.  Chakra is entirely invisible to it, as if it isn't there at all.  If there's anything that her chakra is doing to the underlying physical matter and energy, it creates noticable looking gaps where things seem to leap from one place to another or appear from nothing, like looking into the gears of a clock where some of the gears are invisible.

Interesting. Does that change if she channels chakra through it?

There's no change.

"Interesting. The knowledge from this is more in depth, I believe, at any specific point than our scans are without immense training, but it's less of a - controlled overview, I would say. I could use chakra to tag and follow a specific hormone fairly easily, and isolate the changes it causes. It gives more information at once, too, but seems unaware of chakra itself, and seems to have an independent idea of what injury is."

"I've noticed it fails to show local magics that affect the body as well.  Potions that cause an increase in strength for a short time, for example.  I haven't looked into them much, because potions are expensive and looking at the energy appearing from nothing makes me a bit dizzy, but I wouldn't be surprised if it handled chakra similarly.  

"There's definitely an intelligence to a number of magics.  From what Diamondeye has mentioned, it's not the gods themselves nor is it a self-aware person.  Chakra doesn't have anything like it?"

"Chakra has - standard things it does, but it's in much the same way water behaves consistently in certain circumstances."