Transdermal patches (adhesive patches placed on the skin) may also be used to deliver a steady dose through the skin and into the bloodstream. Testosterone-containing creams and gels that are applied daily to the skin are also available, but absorption is inefficient (roughly 10%, varying between individuals) and these treatments tend to be more expensive. Individuals who are especially physically active and/or bathe often may not be good candidates, since the medication can be washed off and may take up to six hours to be fully absorbed. There is also the risk that an intimate partner or child may come in contact with the application site and inadvertently dose himself or herself; children and women are highly sensitive to testosterone and can suffer unintended masculinization and health effects, even from small doses. Injection is the most common method used by individuals administering AAS for non-medical purposes. 
There are possible side effects of Testosterone Enanthate use, but we will find they are extremely easy to avoid for the healthy adult male. When we refer to the healthy adult male we are excluding the issue of low testosterone. For the low level patient, the probability of side effects will be extremely low. In such a case, the individual is merely replacing what he’s lacking and nothing more. For the performance athlete, the side effects of Testosterone Enanthate will carry a greater probability, but should still be very controllable. Most men can tolerate high levels of testosterone very well. However, as with many things in life individual response and sensitivity issues will play a role. This is not unique to Testosterone Enanthate but holds true with all things we put in our body. In order to understand the possible side effects of Testosterone Enanthate, we have broken them down into their separate categories along with all the information you’ll need.
Vaccines may be monovalent (also called univalent ) or multivalent (also called polyvalent ). A monovalent vaccine is designed to immunize against a single antigen or single microorganism.  A multivalent or polyvalent vaccine is designed to immunize against two or more strains of the same microorganism, or against two or more microorganisms.  The valency of a multivalent vaccine may be denoted with a Greek or Latin prefix (., tetravalent or quadrivalent ). In certain cases, a monovalent vaccine may be preferable for rapidly developing a strong immune response.