An infant in Malaysia has been diagnosed with polio, in the first case reported in the country in nearly three decades, a top health official said on Sunday.The three-month old baby boy from Tuaran, in Malaysia’s Sabah state on Borneo island, tested positive for polio on Friday after being admitted to hospital with a fever and muscle weakness, Director General of Health Noor Hisham Abdullah said in a statement.“The patient is being treated in an isolation ward and is in stable condition, but…