A cell containing smallpox viruses, as captured by transmission electron microscopy

UP­DATE: Re­ports of small­pox-la­beled vials at Mer­ck plant con­tained 'no trace' of virus

Small­pox was de­clared erad­i­cat­ed in 1980 by the World Health Or­ga­ni­za­tion, af­ter an ef­fort to vac­ci­nate the globe. But sev­er­al vials la­beled as the dis­ease …

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