Members of F1’s travelling circus have been admitted to hospital in Austin, the Swiss newspaper Blick reports.
The report said three members of the press from Portugal, Denmark and England respectively, and "some members" of the Red Bull team, are in hospital.
Rumours suggest the Briton involved is the well-known photographer Keith Sutton, while the other two press-men are journalists Peter Nygaard and Luis Vasconcelos.
The newspaper claimed they have contracted infectious diseases after being bitten by mosquitoes in India late last month.
During the Indian grand prix weekend 20 days ago, we reported that the swarms of mosquitoes in the Delhi area could be carrying the infectious and potentially life-threatening dengue fever.
Blick also mentioned malaria.