Construction during pandemic

The third cholera pandemic (1846–1860) was the third major outbreak of cholera originating in India in the 19th century that reached far beyond its borders, which researchers at University of California, Los Angeles (UCLA) believe may have started as early as 1837 and lasted until 1863.
In the Russian Empire, more than one million people died of cholera.
In 1853–1854, the epidemic in London claimed over 10,000 lives, and there were 23,000 deaths for all of Great Britain.
This pandemic was considered to have the highest fatalities of the 19th-century epidemics.