Figure 4.
June – July temperature in 1829 – 1960 from Helsinki (Finland) and the annual malaria frequency trends in Finland in 1750 – 1960.
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.