Mae nifer yr achosion yn ardal Cyngor Bwrdeistref Sirol Caerffili wedi codi’n sylweddol, o ran niferoedd absoliwt ac fel canran o’r bobl sy’n cael prawf.
There has been a significant increase in cases in the Caerphilly Borough County Council area both in absolute terms and as a proportion of the number of people being tested.