For the first time, Cameroon has successfully completed the full sequencing of a circulating variant poliovirus type 3 (cVDPV3), marking a major achievement in Africa’s ongoing battle to eliminate polio. While wild poliovirus type 3 was declared eradicated in 2019, variant strains can still emerge in areas with low immunity, making rapid detection and response vital to controlling outbreaks.
With its expanded sequencing capacity, Cameroon’s national polio laboratory can now detect poliovirus and deliver provisional results before confirmatory testing by the regional reference lab in Ghana. This ability to act locally has reduced delays, accelerated outbreak responses, and strengthened national ownership of disease surveillance efforts. While samples are still sent to Ghana for quality assurance, Cameroon’s immediate detection and intervention reflect the growing strength of Africa’s regional laboratory network.
The World Health Organization’s (WHO) Regional Office for Africa has been driving this progress under the leadership of Dr. Jude Anfumbom Kfutwah, who emphasized that expanding in-country sequencing labs is key to fighting polioviruses and other vaccine-preventable diseases. Across Africa, countries are investing in local sequencing facilities to bring testing closer to outbreak zones. Nigeria’s new sequencing lab in Ibadan, for instance, has already reduced variant poliovirus type 1 sequencing turnaround time by 41 percent, allowing for faster public health responses.
Previously, many African nations had to send samples across borders for analysis, leading to significant delays. The establishment of local sequencing capacity has shortened these timelines and strengthened the continent’s ability to contain potential outbreaks swiftly.
In addition to expanding labs, countries are also adopting next-generation tools like the MinION nanopore sequencer—a portable device capable of quickly decoding viral genomes even outside of traditional laboratory settings. By enabling rapid, on-site virus detection, such technologies ensure that health teams can respond to outbreaks faster and more effectively. A recent comparison of sequencing methods showed that MinION can deliver results faster than traditional Sanger sequencing, an advantage that can make the difference between containing an outbreak locally or facing widespread transmission.
Cameroon’s breakthrough demonstrates growing national leadership and resilience within Africa’s polio eradication efforts. By developing their own sequencing and analysis capabilities, countries are gaining greater autonomy and accelerating the region’s path toward a polio-free future. Every improvement in detection speed translates into better protection for children and a stronger, more responsive public health system across Africa.
