DNA tests of Lassa virus mid-outbreak helped Nigeria target its response

Analysis of genetic data in the field eased worries that a more transmissible strain had arisen

Lassa virus

PATHOGEN PROBLEM  Lassa virus (shown in this transmission electron micrograph) caused a bigger-than-usual outbreak in Nigeria in 2018. Analyzing viral DNA in the field helped public health officials figure out why.

Ami Images/Science Source

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