Can the cholera vaccine be used as a reactive campaign?
The cholera vaccine is a key tool for stopping outbreaks after they start. Public health experts recommend using oral cholera vaccines alongside water, sanitation, and hygiene improvements to control disease spread 12. This approach helps lower the number of infections quickly during emergencies in affected areas.
What the research says
A 2022-2023 outbreak in Malawi showed that reactive vaccination cut transmission by 53.5% to 62.1% 1. In Cameroon, a single-dose campaign during an outbreak caused weekly cholera cases to drop from 10.5 to 9.3 per week in the region 6. Another report from Dhaka, Bangladesh, described a reactive campaign that reached 99% of the target population in the first round 5.
Research from India suggests that reactive high-risk vaccination is more effective than reactive ring or mass vaccination when vaccine supplies are limited 4. However, if enough vaccine is available, pre-vaccination campaigns can be more effective than reactive ones 4. In Cameroon, the 2019 epidemic curve went down after the OCV intervention, unlike the previous year 6.
What to ask your doctor
- Is the cholera vaccine recommended for my area if an outbreak is happening nearby?
- What water and hygiene steps should I take while waiting for the vaccine campaign?
- Are there specific groups, like pregnant women or children under one year, who should not get the vaccine?
- How long does it take for the vaccine to start protecting me after I receive it?
This question is drawn from common patient questions about Infectious Disease and answered using cited medical research. We do not provide individualized advice.