Fewer TB tests were completed in April 2020 compared to the previous year, largely due to COVID-19 and social distancing restrictions in place.
Cwblhawyd llai o brofion TB rhwng mis Ebrill a Mehefin 2020 o gymharu â'r flwyddyn flaenorol, yn bennaf oherwydd COVID-19 a chyfyngiadau pellter cymdeithasol ar waith.