Menactra Vaccine Immunogenicity. Helps protect against 4 vaccineâpreventable serogroups1,2. Immunogenicity proven in clinical trials â confirmed in everyday use1. The immune responses to Menactra and Menomune-A/C/Y/W-135 vaccines were comparable for all 4 serogroups1,6.
The mediastinum is the middle section of the chest cavity. The chest cavity contains the left and right lungs, which lie on either side of the heart. The heart is contained in the portion of the chest known as the mediastinum.
Human heart is not on the left side. It on the Mediastinum which is the central cavity of the thoracic portion of the human body. The left portion is slightly bigger(2/3) in size which will lie on the left side of the thoracic cavity. In the case of Situs Inversus, The heart appears to be on the right.