Chemotherapy is a treatment for fighting the deadly disease cancer. Chemotherapy certification is given by a organization called ONS. Chemotherapy certification is given to nurses as they complete the training course to apply the therapy. It is very much necessary for understanding chemotherapy for nursing students because application of the therapy involves a lot of procedures. When a nurse completes the chemotherapy certification course she receives an ONS chemotherapy provider card. This certificate cannot be called as a course completion certificate because the application of the acquired knowledge varies from individual to individual. If a nurse applies for a job it is the responsibility of the recruiting agency to judge the talent of the individual. Though these nurses who have undergone chemotherapy certification course have the knowledge to be applied in the practical area of the treatment they don’t have the permission to prescribe in any chemotherapy drugs. When the certificate needs to be updated the nurses can avail the facility of updating the same online. Dogs and cats are generally the popular pets and they of course carry lots of bacteria, fungi infections which cause illness to humans. Especially a individual undergoing chemotherapy and infections of dogs of such persons is easily caused as they have weak immune system.