Paciente zero

Quality:

Index case - initial patient in the population of an epidemiological investigation. Article “Paciente zero” in Portuguese Wikipedia has 25.3 points for quality (as of July 1, 2026). The article contains 8 references and 3 sections.

This article has the best quality in Malay Wikipedia. However, the most popular language version of this article is English.

Since the creation of article “Paciente zero”, its content was written by 21 registered users of Portuguese Wikipedia and edited by 484 registered Wikipedia users in all languages.

The article is cited 97 times in Portuguese Wikipedia and cited 2196 times in all languages.

The highest Authors Interest rank from 2001:

• Local (Portuguese): #5065 in May 2022
• Global: #3425 in December 2003

The highest popularity rank from 2008:

• Local (Portuguese): #10914 in March 2020
• Global: #2995 in March 2020

There are 25 language versions for this article in the WikiRank database (of the considered 55 Wikipedia language editions).

The quality and popularity assessment was based on Wikipédia dumps from July 1, 2026 (including revision history and pageviews for previous years).

The table below shows the language versions of the article with the highest quality.

#	Language	Quality grade	Quality score
1	Malay (ms) Kes indeks		78.653
2	English (en) Index case		49.8628
3	Hebrew (he) חולה 0		49.4491
4	Japanese (ja) インデックス・ケース		30.5382
5	German (de) Indexpatient		28.8979
6	Estonian (et) Nullpatsient		26.2925
7	Catalan (ca) Cas índex		25.9844
8	Ukrainian (uk) Нульовий пацієнт		25.4532
9	Vietnamese (vi) Bệnh nhân số 0		25.3306
10	Portuguese (pt) Paciente zero		25.3132

The following table shows the most popular language versions of the article.

#	Language	Popularity award	Relative popularity
1	English (en) Index case		4 139 466
2	Russian (ru) Нулевой пациент		355 315
3	German (de) Indexpatient		255 026
4	Spanish (es) Caso índice		244 893
5	French (fr) Patient zéro		238 486
6	Italian (it) Paziente zero		149 757
7	Chinese (zh) 指示病例		126 333
8	Portuguese (pt) Paciente zero		121 811
9	Japanese (ja) インデックス・ケース		55 407
10	Polish (pl) Pacjent zero		34 118

The following table shows the language versions of the article with the highest popularity in the last month.

#	Language	Popularity award	Relative popularity
1	English (en) Index case		9 857
2	Russian (ru) Нулевой пациент		1 210
3	Chinese (zh) 指示病例		507
4	French (fr) Patient zéro		397
5	German (de) Indexpatient		267
6	Spanish (es) Caso índice		231
7	Japanese (ja) インデックス・ケース		203
8	Persian (fa) بیمار صفر		159
9	Italian (it) Paziente zero		146
10	Malay (ms) Kes indeks		146

The following table shows the language versions of the article with the highest Authors’ Interest.

#	Language	AI award	Relative AI
1	English (en) Index case		228
2	Italian (it) Paziente zero		56
3	German (de) Indexpatient		41
4	French (fr) Patient zéro		34
5	Portuguese (pt) Paciente zero		21
6	Russian (ru) Нулевой пациент		16
7	Spanish (es) Caso índice		13
8	Hebrew (he) חולה 0		13
9	Chinese (zh) 指示病例		12
10	Japanese (ja) インデックス・ケース		8

The following table shows the language versions of the article with the highest Authors’ Interest in the last month.

#	Language	AI award	Relative AI
1	Arabic (ar) المريض رقم صفر		1
2	Galician (gl) Caso índice		1
3	Hebrew (he) חולה 0		1
4	Catalan (ca) Cas índex		0
5	Danish (da) Indekstilfældet		0
6	German (de) Indexpatient		0
7	Greek (el) Ασθενής μηδέν		0
8	English (en) Index case		0
9	Spanish (es) Caso índice		0
10	Estonian (et) Nullpatsient		0

The following table shows the language versions of the article with the highest number of citations.

On 1 July 2026 in multilingual Wikipedia, Internet users most often read articles on the following topics: 2026 FIFA World Cup, Kylian Mbappé, Erling Haaland, Democratic Republic of the Congo, FIFA World Cup, Harry Kane, Romelu Lukaku, Senegal, Michael Olise, Sadio Mané.

In Portuguese Wikipedia the most popular articles on that day were: Erling Haaland, República Democrática do Congo, Romelu Lukaku, Copa do Mundo FIFA de 2026, Kylian Mbappé, Senegal, Copa do Mundo FIFA, Lista de artilheiros da Copa do Mundo FIFA, Harry Kane, Carlo Ancelotti.

The WikiRank project is intended for automatic relative evaluation of the articles in the various language versions of Wikipedia. At the moment the service allows to compare over 50 million Wikipedia articles in 55 languages. Quality scores of articles are based on Wikipedia dumps from July, 2026. When calculating current popularity and AI of articles data from June 2026 was taken into account. For historical values of popularity and AI WikiRank used data from 2001 to 2026... More information