Vaccines contain dead or weakened microbes of a particular disease. When a vaccine is introduced into a healthy body, the body fights and kills them by producing suitable antibodies. These antibodies remain in the body and protect it when the microbe enters the body again.
(i) Write the name of the disease. (ii) Name the causative agent of this disease. (iii) How does the disease spread from one plant to another? (iv) Name any two plant diseases and the microbes that cause them.
