As of my last knowledge update in January 2022, mesothelioma rates were not decreasing significantly. Mesothelioma is primarily caused by exposure to asbestos, and despite regulations limiting asbestos use in many countries, cases of mesothelioma continue to be diagnosed due to the long latency period between exposure and manifestation of the disease (often ranging from 20 to 50 years).
Efforts to reduce asbestos exposure and increase awareness about its dangers have been ongoing, leading to some decline in mesothelioma rates in certain regions. However, in some parts of the world where asbestos use is not as strictly regulated or where historical exposure was prevalent, mesothelioma rates may not have decreased or might still be increasing.
It’s essential to stay updated with the latest research and statistics from health organizations or government agencies dedicated to tracking mesothelioma rates for the most current information beyond my last update. Always consult reliable and up-to-date sources or medical professionals for the most recent data on this topic.