Shingles vaccine is indicated for people over 50... if she has eruptions only over a localized area of her body (i.e. a strip or line over her back or abdomen) then she needs medical attention NOW.
EDIT: and you as well to be safe,
If it's localized and visible in the body, that's usually pretty good for zoster. If you're going to get a latent activation, you want it to be visible and localized. Don't promote fear by stating "needs medical attention NOW" when that's blowing it out of proportions at this point.
If unbearable pain (at the rash/activation region) and other neurological symptoms crop up, it's good to get to a doctor. The more severe, the more important. But it's also quite possible to have a small rash cluster, minimal pain, and it's gone in a couple weeks.
React based on apparent emergency - don't bother if it seems mild.
If you seem to be getting unbearable pain in the head/neck, and other strange phenomenon, such as possibly flu-like symptoms along with that head/neck pain, get to a doctor stat. Being located on the nerve bundles, zoster can find its way into the large parts of the CNS, such as spine and neck.
"Shingles" can be activated just about anywhere, but if you find it on a small patch of the body, that's preferable to other locations, like the retina or brain. It CAN lead to some serious complications, but symptoms present themselves accordingly. Listen to your body, and you'll know if the virus kept itself to a "good" part of the body or went somewhere it most certainly shouldn't have went. Such serious cases of zoster are not nearly as common as some people might lead you to believe, it's more often not that pervasive and more benign, like a small cluster of blisters, and they may or may not hurt.
<---- board certified Emergency Medicine and Internal Medicine for 20 yrs
First- shingles is very contagious, while a person has open sores they are shedding virus by respiratory droplets. You do not have to touch a lesion.
Second - in addition to avoiding adults that have never had the chickenpox or the vaccine (started giving it routinely to children about 1997), the most susceptable encounters are with pregnant females. If a fetus comes in contact, the mothers immune system may not prevent transmission, and intrauterine herpes zoster infections can lead to brain damage.
third- If I were you, I'd get a Varicella vaccine ASAP. If you get chicken pox - see a doctor to confirm the diagnosis and start anti-viral therapy. Unfortunately, there is no data to prove anti-viral therapy can prevent transmission, but if the disease starts it will be best to get on it asap.
Shingles should rarely be found in the lungs/respiratory system.
Almost all medical sites back me up on this: contact with sores is the only way to "catch" the virus from someone with an active shingles "rash."
It is
possible to spread through the air, but it seems like a very rare case for it to be found in the lungs.
Shingles isn't a whole-body infection or at all related to typical fluid-borne pathogens in the body - it's basically a localized activation of latent virus that is sitting on ganglia somewhere on the body, "activated" by spreading along axiom toward the skin.