CHICAGO (CBS) — The American Red Cross is hoping to boost inventory, in what is a typically slow period.

The cold, winter months and flu season can make it more challenging for people to come out and donate blood.

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According to the American Red Cross, blood donations tend to decline at this time of year.

So, they’re holding something special in an attempt to encourage donations.

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It’s the Great Chicago Blood Drive and it takes place Monday at two locations. Downtown at the Hyatt Regency Hotel (7 a.m.-6 p.m.) and in Oak Brook at the Drake Hotel (8 a.m.- 6 p.m.).

Anyone age 17 and older, weighing at least 110 pounds can be a donor.

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Walk-ins are welcome, but the Red Cross encourages donors to schedule a donation time. Visit and enter sponsor code Hyatt Regency or Drake Oak Brook depending on your preferred location.