GENEVA : More than 90% of countries have seen ordinary health services disrupted by the COVID-19 pandemic, with major gains in medical care attained over decades vulnerable to being wiped out in a short period, a World Health Organization survey showed.The Geneva-based body has frequently warned about other life-saving programmes being impacted by the pandemic and has sent countries mitigation advice, but the survey yielded the first WHO data so far on the scale of disruptions."The impact of the COVID-19 pandemic on essential health services is a source of great concern," said a report on the study released on Monday. "Major health gains achieved over the past two decades can be wiped out in a short period of time..."The survey includes.