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阿尔及利亚（199年2月18日）：患有类似流感和胃肠症状的在校学生应用免疫荧光法检测，诊断为由甲型和乙型流感病毒引起流行。比利时（199年3月1日）：2月底，有大量的类似流感症状的病例，但尚未证实已有广泛传播。在医院和一般检查中已分离出大量的流感病毒。该季节以甲型流
Algeria (18 February 19999): In-school students with similar flu and gastrointestinal symptoms were tested for immunofluorescence and diagnosed as being prevalent by influenza A and B viruses. Belgium (1 March 19999): As of the end of February, there were a large number of cases of flu-like symptoms, but the spread has not yet been confirmed. Large numbers of influenza viruses have been isolated in hospitals and general examinations. A-type flow of the season