You can get pregnant after having shingles.
Do you mean shingles? Your question isn't clear. If you do mean shingles the virus can be passed on by direct contact with fluid from the shingles blisters, until they dry up and crust over. If your sister is pregnant then you or anyone else who have shingles should avoid contact with her as she would be at risk of catching shingles.
At least a few months
A person with shingles needs to take precautions around a pregnant woman without evidence of immunity to chicken pox. The pregnant woman should discuss the matter with her health care provider, who may have checked immunity at the preconception visit or a prenatal visit. Because typical shingles is communicable only by direct contact with lesions, even health care workers with typical shingles (not severe) are allowed to work as long as the sores can be covered.
Rock salt may not damage shingles themselves but it can cause the nails holding your shingles to the roof to corrode. In turn this rust can cause stains and streaks on your roof. Additionally if this situation gets too bad, shingles become loose and get damage.
If she is ovulating, she can become pregnant. But that is the only way. If she is ovulating, she can become pregnant. But that is the only way.
A women can most likely become pregnant when she is ovulating.
I've heard that you should not be around children or pregnant women for 4 weeks after receiving the shingles vaccine - is that true?
Shingles is not contagious -- it can't be "caught" from someone else. People with shingles can give you chickenpox if you haven't had it. See related link below for information on transmitting shingles
Women become pregnant when a sperm fertilizes one of her eggs.
NO!! Please stay away from the patient!!
No of course not. The only was to become pregnant is if you are a girl who had sex. Then you have the possibility to become pregnant. Not by your mother's assumptions.