does something very special, because most cells in our bodies communicate through chemicals, and yet, these touch neurons have to sense physical stimuli, such as pressure and temperature, and in a way, transform this information into chemical cyclicals that cells can understand, and no one really knew how this happened — that chemical signals. places like san francisco are in the grip of an opioid crisis. more people die here in the city of drugs, mainly from fentanyl overdoses, than from covid last year. hope is that this research will allow scientists to create more targeted and perhaps even addictive pain relief in the future. james clayton, bbc news, san francisco. let's take a look at the uk's latest coronavirus figures. they show 35,077 new infections recorded in the latest 24—hour period, meaning an average of 34,160 new cases per day in the last week.