(CNN) Massachusetts' coronavirus cases have more than doubled and the state's governor declared a state of emergency after employees who attended a company meeting in Boston last month tested positive for the virus.

Tuesday that are awaiting confirmation by the US Centers for Disease Control and Prevention. The surge brings the total number of confirmed or presumptive positive cases in Massachusetts to 92. The state announced 51 new presumptive positive casesTuesday that are awaiting confirmation by the US Centers for Disease Control and Prevention.The surge brings the total numberof confirmed or presumptive positive cases in Massachusetts to 92.

Seventy of the cases are related to employees at Cambridge biotechnology company Biogen, state Health and Human Services Secretary Marylou Sudders said.

Gov. Charlie Baker declared a state of emergency in response to the outbreak.

"The purpose of moving forward with these measures now is to act before the numbers increase to the point where the virus spread is severely impacting the commonwealth," Baker told reporters Tuesday, adding that a spike in cases could overwhelm the state's systems.

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