alpa patel, bbc london. of the second wave. routine testing was announced in december, but research by bbc wales has found it was not introduced in some hospitals until as late as march. paul martin reports. this is a park teresa and her mother spent a lot of happy times in. she loved coming here and bringing us down here when we were children. even my children, she used to come here with me, bringing my children here. my mother was a lovely lady. she would help anyone. injanuary, she had an accident at home, she spilt boiling water on herself making a cup of coffee and ended up at the university of wales in cardiff. she tested negative for covid, but later caught the virus in hospital and died. angry and annoyed. i want answers. how you send people to be safe and to be looked after, and, to me, she was not looked after. you are not supposed to get ill in hospital. they are supposed to make you better. an investigation by the cardiff and vale health board said the likely transmission of the virus was from a