Hong Kong (CNN Business) Some US companies are bracing for the revenue they make in China to be cut in half if the novel coronavirus outbreak extends into the summer.

Nearly half of US companies in China expect revenue from the country to fall this year if businesses can't return to normal before the end of April, according to a survey by the American Chamber of Commerce in China conducted earlier this month. And about a fifth of US companies said 2020 revenue from China will plummet by more than 50% if the epidemic extends through the end of August.

The coronavirus has killed 2,800 people so far, including 56 deaths outside of mainland China. It has sickened more than 82,000 people, the vast majority in China.

late last month. Companies have been struggling to return to normal, as hundreds of millions of people in China remain under travel restrictions. Special trains and planes have been chartered to bring people back to the cities where they work, but even if companies can get their staff in the door, some have been struggling to meet requirements such as providing workers with masks. Business in China ground to a halt when the outbreak acceleratedlate last month. Companies have been struggling to return to normal, as hundreds of millions of people in China remain under travel restrictions. Special trains and planes have been chartered to bring people back to the cities where they work, but even if companies can get their staff in the door, some have been struggling to meet requirements such as providing workers with masks.

For the AmCham survey, US companies said global travel restrictions, reduced travel to and from China, supply chain disruptions and a shortage of necessary medical supplies are all affecting their business in China.

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