A state Senator who represents South County and West County and has been a harsh critic of business restrictions intended to limit the spread of COVID-19 has tested positive for the contagion and may have infected others during two lengthy committee meetings. Sen. Andrew Koenig, R-Manchester, confirmed on Twitter Friday afternoon that he is ill, sending the tweet about 18 hours after rumors began circulating of his infection. “I am self-isolating after I have tested positive for COVID-19,” Koenig wrote. “Fortunately, I am experiencing mild symptoms. Out of an abundance of caution, I will be quarantining at home for the next 10 days. I look forward to fully resuming my duties for the people of St. Louis County soon.”