मोनफ्रोम 2 - 3 बोसोरफोराव , जों मायसिननि मोनसे गोदान जोलै जौगाहोयो आरो 2 - 3 बोसोराव बेफोरो होबथा बेकतेरिया उजिनायनि थाखाय उदायि जायो ।
Every 2 3 years we develop a new generation of mycin and in 2 3 years they become ineffective due to growth of resistant bacteria .