Choose all the answers that apply. Vaccination .

was developed by Wilhelm Röentgen
provides a type of adaptive immunity
injects a weakened or inactive form of a virus into the body
is 100 percent effective in disease prevention
must be given on a regular basis from birth to 18 years of age

The magnitude of the magnetic field at a certain distance from a long, straight conductor is represented by b. what is the magnitude of the magnetic field at twice the distance from the conductor? a. at twice the distance, the magnitude of the field is 4b.b. at twice the distance, the magnitude of the field is 2b.c. at twice the distance, the magnitude of the field is b/2.d. at twice the distance, the magnitude of the field is b/4.e. at twice the distance, the magnitude of the field remains equal to b.