Most people get chicken pox when they are young, but the symptoms can be more severe among people who catch the infection in an older age. They include loss of appetite, fever, headache, tiredness and rashes, all of which can be more taxing on the health of elderly adults.
http://healthland.time.com/2013/01/29/5-things-you-should-know-about-chickenpox-and-shingles/
Adults can develop severe pneumonia and other serious complications. Shingles occurs when the virus, which has been inactive for some time, becomes active again. Severe pain and numbness along nerve pathways, commonly on the trunk or on the face, are present. Clusters of blisters appear 1 to 5 days later.
http://health.mo.gov/living/healthcondiseases/communicable/chickenpox.php
1 If you are pregnant and have never had chickenpox, and you get chickenpox during the:  First half (about 20 weeks) of your pregnancy, there is a very slight risk (0.4% to 2%) for birth defects or miscarriage.
http://health.mo.gov/living/healthcondiseases/communicable/chickenpox.php
About 1 out of 3 people in the U.S. is affected by shingles at some point in their lives, with the majority of cases occurring in men and women ages 60 and older. Shingles is less contagious than chicken pox and cannot be passed from person to person. However, the varicella zoster virus can be spread from a person with shingles to someone who has never had chicken pox. The unfortunate recipient might develop chicken pox, but not shingles.
http://healthland.time.com/2013/01/29/5-things-you-should-know-about-chickenpox-and-shingles/
You can, however, catch chickenpox at any age if you’ve never had it before. Chickenpox is contagious. It can even be spread when a person with chickenpox coughs. Someone with shingles can spread the virus to someone else only if that uninfected person has direct contact with a rash that hasn’t yet healed. While you won’t catch shingles from exposure to such individuals, you could be exposed to VZV and develop chickenpox.
http://www.healthline.com/health/shingles-and-pregnancy
If you have shingles, you can give another person chickenpox if they haven't had it already. So, if your husband has not had chickenpox yet, you could give him chickenpox, but not shingles. You will be contagious for about a week after the rash appears. If you have shingles, chickenpox is usually transmitted through contact with the open blisters of the rash. The best thing to do is keep your rash covered up so no one will have direct contact with it, and so you won't touch it and then touch someone else.
https://www.hellolife.net/shingles/b/is-shingles-contagious-could-i-give-it-to-my-husband/
You cannot get shingles from another person. Shingles is caused by the varicella-zoster virus, the same virus that causes chickenpox. After you have chickenpox as a child, the virus lies dormant in your nervous system. Sometimes, for reasons not entirely understood, the virus is activated, causing shingles.
https://www.hellolife.net/shingles/b/is-shingles-contagious-could-i-give-it-to-my-husband/
The blisters are usually on one side of the body and closer together than in chickenpox. Shingles does not spread as shingles from one person to another. If people who have never had chickenpox have contact with the fluid from the shingles blisters, they can develop chickenpox.
http://health.mo.gov/living/healthcondiseases/communicable/chickenpox.php
If you have been in contact with someone with chickenpox or shingles, or if you have a rash-associated illness that might be chickenpox or shingles, discuss your situation with your healthcare provider. Blood tests may be done to see if you have become infected with the virus or have had the disease in the past.
http://health.mo.gov/living/healthcondiseases/communicable/chickenpox.php
A person with shingles, on the other hand, can only spread their infection while their skin rash is still blistering. They’re not contagious before the blisters occur, and are no longer contagious once the rash starts to scab.
http://healthland.time.com/2013/01/29/5-things-you-should-know-about-chickenpox-and-shingles/
how is shingles spread to someone else
The varicella zoster virus can be spread from a person with shingles to someone who has never had chicken pox.