4. For both P. vivax and P. ovale, clinical relapses may occur weeks to months after the first infection, even if the patient has left the malarious area.
至于间日疟和卵形疟，即使患者已经离开疟疾流行区，仍可能会在初次感染数周至数月后临床复发。
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5. More than one-third of the 108 malarious countries (9 African countries and 29 outside of Africa) documented reductions in malaria cases of more than 50% in 2008 compared to 2000.
6. More than one-third of the 108 malarious countries (9 African countries and 29 outside of Africa) documented reductions in malaria cases of more than 50% in 2008 compared to 2000.
