The South Korean government is keeping close tabs on 21 people who came into close contact with a man who tested positive for MERS last week.<br /> However,... the government has admitted it hasn't been able to contact 50 of the 115 foreigners who had non-direct or "ordinary" contact with the patient.<br />Those who came within two meters of the MERS patient are considered to have come into 'close contact'.<br />As of Monday, six people,... including one flight attendant who had close contact with the patient, have undergone tests.<br />Of them, a British woman,... tested negative twice and was discharged from hospital,... the five others are awaiting a second round of tests after testing negative the first time.<br />During the 2015 MERS outbreak in South Korea,... dozens of people died after contracting the virus. <br />