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.
Describe the size and position of the heart in the thoracic cavity. 12cm long, 9cm wide, 6cm thick, size of a closed fist. Located in mediastinum, rests on diaphragm, 2/3rd of mass lies to left of midline.