What was a direct result of the discovery that germs caused disease?

Explain in the simplest form what laissez faire is

Which statement best describes the response by the united states and its allies to the berlin blockade? planes dropped tons of supplies around the city each day. trucks smuggled tons of supplies into berlin about once a week. tons of supplies were delivered to west berlin by boats. tons of supplies were purchased from east berlin each day.

Which type of constitutional power allows congress to regulate immigration and naturalization?