A negative publicity or a corporate crisis can possibly do a lot of harm to your company. Whether it is real or not, some people may lose their trust on your brand or service once they have heard of the negative campaign against your biz. The key to counter this is to hire an experienced PR firm. They may not be able to undo the publicity public relation firms in los angeles but they can launch programs and campaigns that can mitigate the result of such a negative ad. Hire a PR team with an experience in handling negative publicity of other companies which yielded positive results.