West Nile virus infections are intense so far this year, with case counts running 40% higher than normal, health officials say.
More than 770 cases, including about 490 severe cases, were reported as of early September, according to Centers for Disease Control and Prevention data posted this week. About 550 cases — 350 of them severe — are usually reported by this time of year.
Health officials are ramping up warnings to the public, because most cases of the mosquito-borne disease are reported in August and September…