Shingles is caused by the activation of the varicella-zoster virus that lies dormant in the nerve roots, affecting both the skin and nerves. There are several ways shingles can spread, mainly through direct contact or droplet transmission. Direct contact transmission primarily occurs because the blister fluid in shingles blisters contains a high concentration of the virus. Therefore, before the blisters of a person with shingles are completely dry, they are somewhat contagious, primarily affecting those with lower resistance such as the elderly, children, women of childbearing age, pregnant women, and so on.