Outbreaks of the mosquito-borne Zika virus in Singapore and Malaysia have barely registered with Formula One drivers due to race there this month but there is some concern behind the scenes.
Five of the last eight rounds of the championship are in regions where Zika has been reported — Singapore and Malaysia before Texas and Mexico in October and Brazil in November.
Authorities in Singapore said they had detected 151 people with Zika as of midday Thursday. The first locally-transmitted infection was reported on Saturday.