The double Olympic champion offered his support to the victims of the tragedy in the US, but insisted that the incident has not deterred him from competitive running.
"This is home for me. This is where I grew up and there's no reason not to do this," Farah told BBC Sport.
"It's sad news what happened in Boston and my support goes to all the people and families. Those people would want us to carry on and do the best that we can.
"You can't be thinking about negative things. You just have to be positive and do what we came out here to do."
Farah will be one of 35,000 runners to tackle the 26.2-mile course this Sunday.