Here is a very clever individual, well-read, studied, researched, full of facts and frequent adventures into yet newer subjects. Things just interest them. They will not pass by a word they don't understand. Reference the dictionary instead, or ask what the word means. They are not afraid to use Google as intended – to ask questions and get real answers. But not so fast. In their amassing of information, they come across many things they know nothing about – and that's no good… so no matter how much they learn, they are met with the simple fact that there is more to learn and you can't absorb or know it all.
They'll make flash cards. They'll help you write an essay, or figure out a math problem, or get through a chemistry question. They'll make a nice study guide for themselves, maybe they'll share it with other people. They tend to be more innocent, at younger ages they can get taken advantage of giving lots of help/cognitive assistance… to get not much in return. Frequently, they may find themselves more invested in a subject than the person initially asking the question. So they can write out really long essays, grapple with huge ideas, try to organize it all… really just to pass the time. It's what they like to do. Be in the physical world, understand it, manipulate it. One thing many Mercury in Virgo are likely to enjoy – the world of plants and animals. They love the plant, fungus, and animal kingdoms! And they are fascinated. There are different flowers with individual qualities… there are bugs having entire ecosystem communities inside of tree bark… there is the invisible life of microbes absolutely everywhere…
And yes, because Virgo Mercury knows more about the nitty gritty details of how Natural Life really is… they are also more aware of good hygiene practices, proper cleanliness, recognizable symptoms, likely causes of disease… and so forth. Like how do viruses come into existence, how do they find a host, how do they replicate? Exciting territory for Mercury in Virgo.
Their natural affinity for information accumulation and management… also makes them a good fit for administrative roles that include the handling of many files, documents, organizing archives or libraries… or handling inventory by keeping track of what's still available and what needs to be ordered, replaced.
Mercury in Virgo is also a natural proponent of literacy… first of all, they're likely to read (or watch) something constantly, it's one way they stay entertained. So they can have a very smarty pants type of character, librarian energy, someone who is incredibly observant, a bit more quiet, not interested in being disruptive or loud. They more studious, slightly nerdy, with a pretty good memory but also losing track of meeting times or where they placed things.
And Virgo Mercury can stretch themselves thin starting up various projects and never completing them, reading too many things and feeling overstimulated, having some level of ADHD juggling several tasks…
And we're back to their love for animals. Mercury in Virgo is very likely to have a pet or take interest in animal life… how they communicate, what their needs are, how their different bodies function… Virgo Mercury can easily be a veterinarian!
Or in fact work with pharmaceuticals, with herbs, with any kind of science that requires long periods of ongoing study…