The view is put forward by the writer that malarial infection was the cause of the decadence of the Greeks. Digital facsimile from the Internet Archive at this link.

Greek–English edition in the Loeb Classical Library. 

“The first book ever written on medical geography, climatology, and anthropology” (Garrison). The Latin translation of this text was first published in Rhazes’ Liber ad Almansorem, Milan, 1481. See No. 39.1. The standard Greek edition is Hippokrates überdie Umwelt. Herausgegeben und übersetzt von H. Diller, Corpus Medicorum Graecorum, I, 1,2, Berlin, 1970.

Hippocrates may be regarded as the first malariologist; he clearly and fully described the intermittent fevers; he was acquainted with seasonal and topographical variations in the distribution of malaria; and he recognized an association between marshes and fevers.

The earliest known description of puerperal fever.

Hippocrates introduced the inductive method of studying epidemics.

This includes the first mention of epilepsy in children. Hippocrates grouped all convulsive attacks together as ερα νο̂σος, the sacred disease. He did not employ the word έπίληψις, (which seems first to have been used in the 10th century by Avicenna) but the terms ρόν νόσημα, παθος παίδειον and νόσημα παίδειον. The standard Greek edition is Die hippokratische Schrift Über dieheilige Krankheit. Herausgegeben, übersetzt und erläutert von H. Grensemann, Berlin, 1968.

The Hippocratic Oath forms the basis of medical ethics. It was probably an ancient temple oath of the Asclepiadae, and not a genuine Hippocratic document. In the above work the various manuscripts of the Oath are enumerated and critically discussed.

The first description of the association of proteinuria and chronic renal disease.

The text edited by Diels, with an English translation, introduction and notes by Jones, together with essays on the nature of Greek thought and medicine.