Omicron may not cause as much lung damage as the delta variant of the COVID-19 virus, according to new lab studies. That, plus vaccination, may help explain why patients with omicron are not being hospitalized or dying as often as patients infected with previous variants. But omicron is still killing an average of 1,200 people each day in the United States, about equal to the peak of the second COVID-19 wave in July and August of 2020. “If it’s milder compared to delta; delta was horrible,” said Joe Grove, a senior lecturer at the University of Glasgow Centre for Virus Research. “This has not necessarily just turned into the common cold all of a sudden. It is still something that we should be concerned about.” Plus, experts caution, omicron’s ferocious infectiousness means the less virulent virus can still do a lot of damage, especially among the unvaccinated who are elderly …