Officials at the St. Charles County Health Department in Missouri said they were disappointed after no one showed up to a mobile Covid-19 vaccination center offering vaccines to those attending a local annual fair this week. The St. Charles County Fair kicked off Tuesday at the Rotary Park in Wentzville, a St. Louis suburb. Attendees had the chance to get the Pfizer/BioNTech or Johnson & Johnson vaccine on Tuesday and Friday between 4 p.m. and 7 p.m., according to county health officials.