<?xml version="1.0"?><ownershipDocument><schemaVersion>X0201</schemaVersion>    <documentType>4</documentType><periodOfReport>2003-08-20</periodOfReport><notSubjectToSection16>0</notSubjectToSection16><issuer><issuerCik>0000767673</issuerCik><issuerName>SEROLOGICALS CORP</issuerName>        <issuerTradingSymbol>SERO</issuerTradingSymbol></issuer><reportingOwner><reportingOwnerId><rptOwnerCik>0001193617</rptOwnerCik><rptOwnerName>SHAW GEORGE M</rptOwnerName></reportingOwnerId><reportingOwnerAddress><rptOwnerStreet1>5655 SPALDING DRIVE</rptOwnerStreet1><rptOwnerStreet2></rptOwnerStreet2><rptOwnerCity>NORCROSS</rptOwnerCity><rptOwnerState>GA</rptOwnerState><rptOwnerZipCode>30092</rptOwnerZipCode><rptOwnerStateDescription></rptOwnerStateDescription></reportingOwnerAddress><reportingOwnerRelationship><isDirector>1</isDirector><isOfficer>0</isOfficer><isTenPercentOwner>0</isTenPercentOwner><isOther>0</isOther></reportingOwnerRelationship></reportingOwner><nonDerivativeTable><nonDerivativeTransaction><securityTitle><value>Common Stock, $0.01 Par Value</value></securityTitle><transactionDate><value>2003-08-20</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>P</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionTimeliness><value></value></transactionTimeliness><transactionAmounts><transactionShares><value>2000</value></transactionShares><transactionPricePerShare><value>13.5</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><postTransactionAmounts><sharesOwnedFollowingTransaction><value>8000</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></nonDerivativeTransaction></nonDerivativeTable><footnotes></footnotes><remarks></remarks><ownerSignature><signatureName>/s/ Craig Brown, Attorney in Fact for George M. Shaw</signatureName><signatureDate>2003-08-20</signatureDate></ownerSignature></ownershipDocument>

