Ennis-Hill deeply concerned by Zika threat ahead of Rio

Athletics - Jessica Ennis-Hill launches extension of Santander Cycles to Queen Elizabeth Olympic Park - Queen Elizabeth Olympic Park - 21/1/16 Action Images via Reuters / Peter Cziborra

(Reuters) - Britain's world and Olympic heptathlon champion Jessica Ennis-Hill is deeply concerned about the threat of the Zika virus in Brazil ahead of this summer's Olympics in Rio de Janeiro.

An outbreak of the mosquito-borne Zika virus, linked to numerous cases of the microcephaly birth defect in Brazil, has spread in Latin America and the Caribbean, causing panic and leading some athletes to consider whether to attend the Games.