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Table 1 Overview of the number of Twitter messages that were queried from TwiNL and filtered, from the period between January 2012 and February 2017

From: Monitoring stance towards vaccination in twitter messages

Query term (original)

Query term (English)

Before filtering

Excluding retweets

Excluding URLs

Excluding blacklist

Vaccinatie

Vaccination

30,730

20,677

8,872

8,818

Vaccin

Vaccine

21,614

16,046

4,154

4,121

Vaccineren

Vaccinate

20,689

11,904

4,682

4,653

Rijksvaccinatieprogramma

Gov. vacc. programme

1,151

520

160

158

Vaccinatieprogramma

Vacc. programme

644

407

121

120

Inenting

Inoculation

8,597

7,093

4,046

4,038

Inenten

Inoculate

13,141

9,535

5,640

5,626

Total

96,566

66,182

27,675

27,534

  1. ‘URLs’ refers to tweets with a URL. ‘blacklist’ refers to words related to animal vaccination and vaccination related to travelling: ‘dier’ (animal), ‘landbouw’ (agriculture), and ‘teek’ (tick)