Explain the rationale behind why world quarantines have been put in place to flatten the curve. Use the words density-dependent limiting factors, emigration, immigration, death rate and population.

The quarantine can be regarded as an "invisible barrier" that prevents the virus from spreading.

Explanation:

The curve of infections increases when the virus's infection rate in the population greater than 1. The emigration is one of the most important density-dependent limiting factors responsible for increasing the curve of infections, while immigration and the death rate are factors that reduce its maximum value.