As the global COVID-19 total topped 20 million today, Russia's president said the country is the world's first to approve a vaccine, though it is not fully tested, and New Zealand reported its first local cases after going more than 100 days with no transmission.The pandemic total today rose to 20,166,415 cases, and 738,266 people have died from their infections, according to the Johns Hopkins online dashboard.Russia vaccine announcement stirs skepticismEarlier reports said Russia was in early human trials with an adenovirus vaccine developed by the Gamaleya Institute, with an approval expected in the first half of August to coincide with the launch of large-scale trials.