>>> some children vacs named in the -- vacs nateed in the south bay -- vacs nateed in the south bay may have to be revaccinated. 4300 letters are being sent to parents saying a faulty refrigerator was used to store vaccineses in san jose. the vaccines were kept too cold and it may have reduced effectiveness. >> it's put into question the effectiveness of the vaccines we gave. not the safety. there's no safety concern here. >> reporter: the vaccines were apparently given to children between february of last year and march of this year. the clinic says it has set up a hot line for parents with questions and it is also replacing its refrank rit rater -- refrigerator. >>> a proposal to change rent control laws is expected to go before the san jose city council. the city already has rent control. but that law applies before