DTaP[edit] DTaP (also DTPa and TDaP) is a combined vaccine against diphtheria, tetanus, and pertussis, in which the component with lower case 'a' is acellular. This is in contrast to whole-cell, inactivated DTP (aka DTwP). The acellular vaccine uses selected antigens of the pertussis pathogen to induce immunity.
The Battle of Pea Ridge was fought March 7-8, 1862, and was an early engagement of the American Civil War (1861-1865). Armies & Commanders: Battle of Pea Ridge - Background: In the wake of the disaster at Wilson's Creek in August 1861, Union forces in Missouri were reorganized into the Army of the Southwest. Numbering around 10,500, this command was given to Brigadier General Samuel R. Curtis with orders to push the Confederates out of the state.
In a rare image of President Lincoln at Gettysburg, he is shown hatless at the center of a crowd on the oratorsâ platform. (Library of Congress) In the summer of 1863, General Robert E. Lee pushed northward into Pennsylvania. The Union army met him at Gettysburg, and from July 1 to July 3, the bloodiest battle of the war ensued. By the time it was over, the Confederates were in retreat, and the battlefield was strewn with more than 50,000 dead and wounded. Four months later, thousands gathered at Gettysburg to witness the dedication of a new cemetery.