A statement from Netanyahu's office said an 'epidemiological investigation is being conducted, which will provide appropriate guidelines for those who came into contact' with the employee. Netanyahu has previously self-isolated after two separate COVID-19 scares -- first in March after coming into contact with an infected aide, and later in April after his then-health minister was diagnosed with the virus. The premier tested negative for the virus on both those occasions. Israel's health ministry generally requires 14-day self-isolation for anyone deemed to have been in proximity with an infected person. Israel has reported more than 17,100 COVID-19 cases and 285 deaths. After enacting restrictions early in the outbreak, Israel eased its lockdown in mid-April and gradually allowed schools, businesses, beaches, shops and restaurants to reopen, citing a sustained decrease in new infections. But infection rates have ticked up over the past week, and Netanyahu has warned that coronavirus curbs would be reimposed if the trend continues.