PROMIT MUKHERJEE and TUMELO MODIBA TRAFFIC through South Africa's main airport was minimal despite international flights resuming after a six-month ban, with last-minute government curbs leaving many would-be tourists unable to enter the country. The government announced on Wednesday it would not allow visitors from countries with currently higher coronavirus infection and death rates than South Africa. That announcement, coming 12 days after President Cyril Ramaphosa said the country would re-open its borders, effectively cut out most of the tourist traffic that underpins its struggling economy. The government also said it would revise the list of banned countries every two…