https://www.ijidonline.com/article/S1201-9712(21)00345-3/pdf

Coronavirus: Singapore study suggests hydroxychloroquine and throat spray could protect against infection

https://www.scmp.com/coronavirus/asia/article/3131090/coronavirus-singapore-study-suggests-hydroxychloroquine-and-throat

  • The findings indicate a ‘viable preventive strategy’ against the spread of Covid-19 in high-transmission settings such as dormitories, cruise ships and prisons
  • At the height of the pandemic last year, some of Singapore’s largest clusters emerged among the city state’s migrant workers, housed in crowded dormitories

The following were the infection rates for trialled medications:

  • Vitamin C: 70 per cent infected (or 433 out of 619 participants)
  • Hydroxychloroquine: 49 per cent infected (or 212 out of 432)
  • Throat spray: 46 per cent infected (or 338 out of 735)
  • Ivermectin: 64 per cent infected (398 out of 617)
  • Vitamin C and zinc: 47 per cent (or 300 out of 634)

[Raymond Seet, the study’s lead author] noted there was a “significant absolute risk reduction” of over 20 per cent for those who took hydroxychloroquine and throat spray.