The phrase "a massive outbreak of" is correct and usable in written English.
It can be used when discussing a significant occurrence of a disease, phenomenon, or event that spreads widely.
Example: "The health department reported a massive outbreak of influenza in the region, prompting emergency measures."
Alternatives: "a large-scale outbreak of" or "a significant surge of".
FROM Maine to Massachusetts, a massive outbreak of toxic red tide has shut down the shellfishing industry.
While the war in Syria persists, while Isis exists – indeed, until there is a massive outbreak of unprecedented peace – certain facts will remain unarguable.
To make matters worse, a massive outbreak of scabies has resulted from the water shortage: the health service has no water to wash bedclothes or flush toilets.
The natives' numbers were down: they were just recovering from a massive outbreak of disease, probably passed on by European traders.
Think back to the birth control pill, circa 1960 -- the one that caused a massive outbreak of swollen breasts, bloating and depression and even triggered life-threatening complications like blood clots.
The town, including much of the economic infrastructure, was badly damaged during fighting in the 1990s (including NATO aerial bombing in 1999) and a massive outbreak of ethnic violence in 2004.
Most often, it takes a massive outbreak to draw attention to meningococcal disease in the region.
In the wake of a massive outbreak in Britain that peaked in 1993, the US intensified precautions to keep BSE out of US cattle and the food supply.
Nipah made its way to humans in Malaysia after causing a massive outbreak in pigs, killing 105 of its 276 victims (Science, 16 April 1999, p. 407).
"It's a massive outbreak, it's absolutely alarming," says Stephen Higgs of the University of Texas Medical Branch in Galveston, one of a few dozen researchers around the world who studies Chikungunya virus, in the lab.
