supply and staff shortages are affecting millions of shoppers across the u.s. right now, grocery stores are facing a number of issues, making it difficult to keep their shelves shelves safe. scott cohn is inv sunnyvale, california. reporter: we are dealing with the issues of omicron which has depleted labor levels and the severe winter weather and will ease at some point but we are seeing some real big issues and spotty across the country. here in sunnyvale this market is well stocked but nationwide from the consumer brand association shows while normally 7 to 10% of items out of stock we look at