The phrase "allowed to spread unchecked" is correct and usable in written English.
It can be used in contexts discussing situations where something is permitted to grow or develop without any control or limitation.
Example: "The misinformation was allowed to spread unchecked, leading to widespread confusion among the public."
Alternatives: "permitted to proliferate freely" or "allowed to grow without restraint."
Government forecasts estimate if the disease was allowed to spread unchecked, it would cost the industry NZ$1.3bn in lost production in 10 years.
The Chinese government had exempted several of the nation's biggest dairies from inspections, one of the reasons the scare was allowed to spread unchecked from baby formula to yogurt to the whole of the Chinese dairy industry and its exports.
As a result, cities have been allowed to spread unchecked and unplanned, leading to urban sprawl and the rapid growth of slums which, in some parts of Africa, are home to more than 50% of the urban population.
Although the alleged gunman was an Australian citizen, the killing of 50 people in the mostly peaceful country last week has prompted national debate and soul-searching about insidious racist attitudes that, some argue, have been allowed to spread unchecked.
They pointed to the case of ultra-nationalist Buddhist monk Ashin Wirathu — who referred to himself as the "Burmese bin Laden" — being allowed to spread hate speech unchecked for years on Facebook.
They said Nahda's failure to take stronger actions against Islamist radicals had allowed extremism to spread unchecked.
He also conceded that the government had no effective education programs and that some local officials tended to cover up the extent of infection, allowing it to spread unchecked.
The body naturally concentrates and stores iodine in the thyroid gland, and when irradiated, the toxic isotope causes a tumor-suppressing gene to malfunction, allowing cancerous growths to spread unchecked.
The World Service ended direct broadcasting to Russia amid swingeing cuts in 2011, a move criticised for allowing Russian propaganda to spread unchecked, three years before the corporation took over direct funding of the service from the Foreign Office.
But the problem came to a head recently as Twitter has grappled with the growing presence of hate groups on its network — and criticism that it's allowing hateful rhetoric to spread unchecked.
The official, Deputy Health Minister Yin Dakui, also conceded the government's failure to develop effective education programs and the tendency of some local officials to cover up the extent of infection in their jurisdictions, allowing the disease to spread unchecked.
