Table 2 Summary of the main characteristics of the eligible studies

Maia et al. [31]

Niterói/RJ

28.4 °C

Directly at the treatment station

1

+

January 2000–December 2000

2

Lima et al. [36]

Pelotas/RS

+

Public locations

16

5 mL

November 1999–October 2001

1

Moura et al. [26]

Teresina/PI

27 °C

Public locations

5

5 mL

June 2000–May 2001

1

Piva et al. [37]

Cachoreira do Sul/RS

+

Basic Health Units or locations closer to the treatment unit

8

80 mL

April 2005–March 2006

1

Amaral et al. [32]

Piracicaba/SP

(26.3–32.5 °C)

Daycares in all the regions of the city

35

5 mL

April 2004–February 2006

1

Silva et al. [30]

Teresina, Floriano, and Parnaíba/PI

28 °C

Basic Health Units and water treatment station

18 (six per city)

2 mL

2004–2005

1

Panizzi et al. [38]

Chapecó/SC

+

Basic Health Units

10

50 mL

November 1995–November 2005

1

Saliba et al. [33]

8 cities northeast the state of São Paulo^⁋

(26.3–32.5 °C)

Public locations

24 (three per city)

+

November 2004–October 2007

1

Peixoto et al. [29]

Jaguaribara/CE

(26.3–32.5 °C)

Two public and one particular institution

3

15 mL

August 2010–July 2011

2

Moimaz et al. [34]

29 cities in São Paulo^⁋⁋

(26.3–32.5 °C)

Public locations

193

+

November 2004–October 2008

1

Assaf et al. [35]

Nova Friburgo/RJ

27.9 °C

Public institutions

60

50 mL

March 2004–February 2011

1

Bergamo et al. [17]

Maringá/PR

17.9 °C

Site close to the treatment station

26

100 mL

December 2010–November 2011

1

Brito et al. [39]

Passo Fundo/RS

27.99 °C

Basic Health Units

28

5 mL

July 2009–July 2010

1

Kuhnen et al. [40]

Lages/SC

18.1 °C

*

22

+

January 2013–December 2013

1