4. Linen, personal effects, and other articles which the sanitary authority considers to have been recently infected shall be disinfected;
5. The parts of the aircraft which have been occupied by persons suffering from smallpox and which the sanitary authority considers to be infected shall be disinfected.
For the purposes of this article, persons shall be considered immune (a) if they can produce proof of a previous attack of smallpox or if they have been vaccinated within less than 3 years and more than 12 days, or (b) if they show local signs of early reaction attesting an adequate immunity. Apart from cases where these signs are present, proof shall be afforded by a written certificate of a doctor, authenticated in the manner prescribed in the second paragraph of article 32.Ante, p. 3283.
CHAPTER II
SECTION I
General provisions.General Provisions
article 36
Where endemicity of yellow fever is suspected. In territories where endemicity of yellow fever is suspected, the High Contracting Parties shall take the necessary steps to ascertain whether yellow fever exists in their territory in a form which, though not clinically recognizable, might be revealed by biological examination.
article 37
Notices to be sent to signatories.
Independently of the notification of the cases and circumstances relating to recognized cases of yellow fever, as laid down in articles 1, 2, 3, 4, 5, and 8 Vol. 45, pp. 2498–2499.of the International Sanitary Convention of June 21, 1926, each High Contracting Party undertakes to notify immediately to the other High Contracting Parties and at the same time to the
