COVID-19 hot spots.Starting 8 a.m. Monday, anyone 18 and older in the city’s five hot spot postal codes can book an appointment at a local large-scale or mobile pop-up vaccination clinic.Adults who live in the postal codes L9C and L8W can book an appointment using Ontario’s online portal and Hamilton Public Health‘s COVID-19 Hotline, while those living in L8L, L8N and L9K can only use the city’s hotline.