2566 Unlnfeoted ships. INTERNATIONAL SANITARY CONVENTION. Jum:21,1926. ARTICLE 33. Veesels uninfected with cholera shall be granted pratique, imme- diately. The health authority of the port of arrival may order in their case the measures provided under Nos. (I), (7), (8) and (9) of Article 30. Surveillance oC crew The crew and the passengers may be Rubjected to a surveillance and ~. not to exceed five days from the date 0: arrival of the ship. The landing of the crew may be forbidden during the same period except for purposes connected with the service and made known to the sanitary authority of the port. ARTICLE 34. tlo~nr~:=n~ Since antiooCholera vaccination is a method of proved efficacy . in checking cholera epidemics, and consequently in lessening the likelihood of the spread of the disease, it is recommended that sani. tary adIninistrations will, in the largest measure possible and as often as practicable, apply specific vaccination in cholera hot~s and grant certain advantages as regards restrictive measures to persons who agree to be vaccinated. Yellow fever. Ships clllSllfted. InCected. Suapected. U nlnCected. MIIISDl'eII Cor Infected. shipe. Personal. C. YELLOW FEVER. ARTICLE 35. A ship shall be regarded as inJectd if there is a case of yellow fever on board, or if there was one at the time of departure or during the voyage. A ship shall be regarded as 8U8pecteil if it had no case of yellow fever but arrives after a voyage of less than six days from an infected port or from an uninfected port in close relation with endemic centers of yellow fever, or if when it arrived having been more than six days out there is reason to believe that it may carry winged Stegomyia (Aedes Egypn1 from the said port. A ship shall be regarded as 'Uni1ifecleil, notwithstanding its having come frOm 8 yellow fever infected port, if having had no case of yellow fever on board and arrived after more than six days on the way there is no reason to believe that it carries winged Stegomvi!L, or when it proves to the satisfaction of the sanitary authority of the port of arrival: (a) That dUling its stay in the port of departure it kept at a distance of more than 200 metres from the inhabited land and at such a distance from the pontoons as to make the access of Stegomyia imErobable; (b) Or that at the time of departure it was subjected to effective fumigation in order to destroy mosquitoes. ARTICLE 36. Ships infected with yellow fever shall undergo the following measures: (1) Medical inspection; (2) The patients shall be landed, and those of them who are in the first five days of the disease shall be isolated so as to prevent contamination by mosquitoes; (3) The other persons who land shall be subjected to observation or surveillance not exceeding six days reckoned from the time of landing;
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