In this task, you are given one english sentence. The major part of the sentences talk about health-related topics, but some of the them describe an organization and its activities. Your job is to translate the given sentences into German.

Social marketing
Soziales Marketing

Contracts may be renewed.
Die Verträge können verlängert werden.

These are divided into those of high and low pathogenicity according to the severity of infection in birds.

Diese Viren werden je nach der Schwere der Infektion bei Vögeln in Viren mit hoher und niedriger Pathogenität eingeteilt.