Hong Kong has issued a red travel alert for the Democratic Republic of Congo as Ebola outbreaks escalate in Central Africa, with at least 139 suspected deaths reported.The red alert – the middle level in a three-tier outbound travel alert system under the Security Bureau – means residents travelling to the country should adjust their plans and avoid non-essential travel due to the significant threat there.The move follows the health authorities’ announcement on Tuesday that the Penny’s Bay...