This may include a random charged plate close to the ground, a pair of parallel conducting wires, etc. All of the above have capacitance. But all electronics books, clearly define a capacitor as a passive two-terminal electrical component used to store electrical energy temporarily in an electric field. Also, it is quite useful to think of a capacitor as storing charge, in order to understand its behavior.
The first immunizations for tetanus, diphtheria and pertussis (the DTaP shots) start when kids are only 2 months old (definitely no earlier than 6 weeks). Adolescents get a booster Tdap shot at around 11-12 years (if they miss it, it's OK for them to get Tdap between 13-18 years). Adults should get a Tdap shot for one of their tetanus boosters. The others will all be Td shots. Remember, you need a tetanus booster every 10 years. If you are over 65 years old you might not need the Tdap shot, but you can still get one. You should talk to your doctor.
DTaP produces fewer side effects and is a safer version of an older vaccine called DTP, which is no longer used in the United States. Tdap vaccine is licensed for people 10 years through 64 years of age. Tdap contains a lower concentration of diphtheria and pertussis toxoids than DTaP. Tdap is given at 11-12 years.Adolescents and adults who have not yet received it should get a one time dose of Tdap at the time of their next tetanus booster.TaP / Tdap / DTP / Td Are you confused about what vaccine you or your child needs? Diphtheria, tetanus, and pertussis are all diseases caused by bacteria. All three can cause severe illness and death. Diphtheria and pertussis are spread from person to person.