You should be fine. The fact that the same US chicken is given antibiotics is another reason I don't buy it. UK permits antibiotics in farming, but many studies show that our levels (especially in the Eastern US where there are no safe distancing rules for chickens) are much higher.
I've never gotten sick from chicken cooked at home. But I do want to avoid the antibiotic issue.
Although permitted, some UK supermarkets ban it. This article shows which UK supermarkets ban routine antibiotics.
UK: Which supermarkets routinely use antibiotics in their meat production?
antibiotics policy.
The results
According to the Alliance, Waitrose has taken action on nearly all of the areas outlined in its questions. They have banned the routine preventative use, restricted the use of the critically important antibiotics and have publicly stated that they’ve banned the use of the last-resort antibiotic colistin. Waitrose is the only supermarket that has committed to publishing antibiotic-use data for its suppliers, although it is not yet clear whether this will be by the farming system.
Marks & Spencer has similarly published a very detailed policy which addresses all of the parameters set out in questions sent by the Alliance, bar the publication of data gathered on antibiotic use in their supply chains. M&S joins Waitrose in being the only two supermarkets to publicly state that they have banned the use of colistin.
Tesco and Sainsbury’s have also implemented a good range of policies, including banning the routine preventative use and restricting the critically important antibiotics, but unlike Waitrose and M&S, they have not yet banned colistin. They also do not publish antibiotic-use data, although they do collect some data, says the Alliance.
The Co-op has banned the routine preventative use of antibiotics, though it isn’t explicit in their policy whether CIAs are restricted. Aldi has a public position on antibiotics published on its website, rather than a full policy. Within this, it mentions measures to limit the routine preventative use of antibiotics, but it is not explicitly banned. It is monitoring use and has restricted the use of CIAs.
Morrisons has banned routine preventative use in chicken, dairy and egg production, but has yet to ban such use in other species. The retailer has also only partly restricted the use of critically important antibiotics, and do not appear to collect antibiotic-use data, says the Alliance.
More at link