Introduction

• 1 January 1981
• book chapter
• Published by Springer Nature
• p. 1-6
• https://doi.org/10.1007/978-3-7091-8625-1_1

Abstract

Keywords

• MAN
• SMALLPOX
• VIRUS
• EMPHASISTYPEITALIC
• 1977A
• VARIOLA
• ESPOSITO
• ATTESTED