We are the people of PPD — thousands of employees in locations worldwide connected by tenacity and passion for our purpose: to improve health. You will be joining a truly collaborative and winning culture as we strive to bend the time and cost curve of delivering life-saving therapies to patients. PPD reactivity in the HIV-1-positive group was 8.3% (p<0.01). The median PPD induration was 2.5mm (range: 2-5mm) in the HIV-1 group and 6.0 mm among healthy participants (range: 3-15mm). There was no correlation between PPD positivity and age.
PPD is a WWW-based database for comparative analysis of protein lengths in completely sequenced prokaryotic and eukaryotic genomes. PPD's core objective is to create protein classification tables based on the lengths of proteins by specifying a set of organisms and parameters.