If you are doing any Type of electric arc welding you need to isolate the computer. After you disconnect the battery you need to have the welding ground clamp as close to the weld as possible being sure that there is nothing electrical between the weld area and the ground clamp. If it is TIG welding then you really have to be careful as the high frequency can and will go anywhere.
If you have had scabies, the symptoms could appear within one to four days after being exposed. Mites are most active at night and the most intense itching occurs at night. Telltale symptoms of scabies include intense nighttime itching and a rash.cabies mites can only live for 48 to 72 hours when not in contact with skin. Indirect transmission is more likely when a person has crusted scabies, and the shard fabric has been in direct contact with skin.
Most of the time you become contagious about One to three days after contracting the flu and stay contagious for up to 5 days after onset of symptoms. However, children and adults with weakened immune symptoms can be contagious to those around them up to 14 days. For colds, most people are contagious for a day before symptoms appear and remain contagious for up to 5-7 days. In rare cases, children can pass a cold for up 14 days. A cold is also known as an upper respiratory infection.