Apparently the poisoning is specific to designers and office workers, not the factory itself.
5 Mar 2018 Novosti: V Taganroge rassleduiut massovoe otravlenie talliem rabotnikov aviazovoda
Taganrog is Investigating Mass Thallium Poisoning at the Aircraft Factory
В Таганроге расследуют массовое отравление таллием работников авиазавода
'Po infornmatsii SMI, sotrudniki prepriatniia pri nevyiasnennykh obstoiatel'stvakh otravilis' toksichnym metalloi talliem.
According to the media, the employees of the company, under the explained circumstances, were poisoned by the toxic metal, thallium.'
5 Mar 2018 Novosti: V Taganroge rassleduiut massovoe otravlenie talliem rabotnikov aviazovoda
Taganrog is Investigating Mass Thallium Poisoning at the Aircraft Factory
В Таганроге расследуют массовое отравление таллием работников авиазавода
'Po infornmatsii SMI, sotrudniki prepriatniia pri nevyiasnennykh obstoiatel'stvakh otravilis' toksichnym metalloi talliem.
According to the media, the employees of the company, under the explained circumstances, were poisoned by the toxic metal, thallium.'