{'fraction_non_alphanumeric': 0.019973368841544607, 'fraction_numerical': 0.005326231691078562, 'mean_word_length': 4.875, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
[Classification and nomenclature of influenza viruses].

Criteria for classifying influenza viruses into genera, types and subtypes have been discussed, with reference to the 6th report of ICTC. The viruses are divided into 2 genera based on the number of the genome RNA segments. Those which contain 8 segments are further divided into types A or B, according to the antigenicity of the NP and M1 proteins. Viruses belonging to type A are finally classified into subtypes according to the serotype of the HA and NA proteins. Thirteen and nine serotypes of HA and NA, respectively, have been identified in nature, where a variety of combination is possible by genetic reassortment. Method for nomenclature of influenza viruses has also been discussed.