I am checking whether i am in danger from infections due to my immune system being damaged through lymphoma.Well sadly i am at risk,mind you i do wear a mask on the bus.Why i have checked is because the father in law aged 94 is coughing and sneezing all over the house,so it seems i still have to be careful,as i am still at risk,but no time limit was shown.But whilst reading it says treatment can cause lung problems and it is advised not to go scuba diving,well blow me,that is one of my favourite pass times,i think not.Another side effect of treatment.