Warnings of a Global Outbreak of the Black Death

Some 1,300 cases of the pneumonic plague, which is transmitted by air, have now been confirmed.

An estimated 50 million lives were lost as a result of the Black Death epidemic of the 1300s.

And now the deadly disease has spread into more African countries after taking root in Madagascar.

Countries affected include South Africa, Mozambique, Tanzania, Kenya, Ethiopia, Comoros, the Seychelles, Mauritius and Reunion.

So far, the virus has killed 124 people and infected around 1,300, but scientist...