As the global COVID-19 total nears 8 million cases, Chinese health officials are investigating a large COVID-19 cluster that appears to be linked to a large wholesale market in Beijing, amid worries that overburdened public health systems are losing visibility on what's happening with flu.The global total today reached 7,973,302 cases, and 434,793 people have died from their infections, according to the Johns Hopkins online dashboard.Global total climbs by 100,000 cases a dayAt a media briefing today, World Health Organization (WHO) Director-General Tedros Adhanom Ghebreyesus, PhD, alluded to the rapid increase in cases, noting that it took 2 months to reach the first 100,000 cases."For the past 2 weeks, more than 100,000 new cases have