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<H1 ALIGN=CENTER><FONT FACE="Times New Roman, Times, Serif" SIZE=3>SECURITIES AND
EXCHANGE COMMISSION<BR>WASHINGTON, D. C. 20549 </FONT></H1>


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<H1 ALIGN=CENTER><FONT FACE="Times New Roman, Times, Serif" SIZE=3>FORM 8-K </FONT></H1>

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<P ALIGN=CENTER><FONT FACE="Times New Roman, Times, Serif" SIZE=2>CURRENT REPORT<BR>PURSUANT TO SECTION 13
OR 15(d) OF<BR> THE SECURITIES EXCHANGE ACT OF 1934 </FONT></P>

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<P ALIGN=CENTER><FONT FACE="Times New Roman, Times, Serif" SIZE=2>Date of Report (Date of earliest event reported) <BR><B>April 21, 2005 </B></FONT></P>


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<P ALIGN=CENTER><FONT FACE="Times New Roman, Times, Serif" SIZE=3><B>MedImmune, Inc.</B><BR>(Exact
name of registrant as specified in its charter)</FONT></P>



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     <TD WIDTH="33%" ALIGN="CENTER"><FONT FACE="Times New Roman, Times, Serif" SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Delaware</FONT></TD>
     <TD WIDTH="33%" ALIGN="CENTER"><FONT FACE="Times New Roman, Times, Serif" SIZE=2>0-19131</FONT></TD>
     <TD WIDTH="34%" ALIGN="CENTER"><FONT FACE="Times New Roman, Times, Serif" SIZE=2>52-1555759</FONT></TD></TR>
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     <TD ALIGN=CENTER><FONT FACE="Times New Roman, Times, Serif" SIZE=2>(State or other jurisdiction of</FONT></TD>
     <TD ALIGN=CENTER><FONT FACE="Times New Roman, Times, Serif" SIZE=2>(Commission File No.)</FONT></TD>
     <TD ALIGN=CENTER><FONT FACE="Times New Roman, Times, Serif" SIZE=2>(I.R.S. Employer Identification No.)</FONT></TD></TR>
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     <TD ALIGN=CENTER><FONT FACE="Times New Roman, Times, Serif" SIZE=2>&nbsp;incorporation or organization)</FONT></TD>
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<P ALIGN=CENTER><FONT FACE="Times New Roman, Times, Serif" SIZE=2><B>One MedImmune Way,
 Gaithersburg, MD 20878</B><BR>(Address of principal executive offices) (Zip Code) </FONT></P>

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<P ALIGN=CENTER><FONT FACE="Times New Roman, Times, Serif" SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Registrant&#146;s
telephone number, including area code (301) 398-0000 </FONT></P>
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<P><FONT FACE="Times New Roman, Times, Serif" SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Check
the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the
filing obligation of the registrant under any of the following provisions (<I>see
</I>General Instruction A.2. below): </FONT></P>

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<P><FONT FACE="Times New Roman, Times, Serif" SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;|_|
Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) </FONT></P>

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<P><FONT FACE="Times New Roman, Times, Serif" SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;|_| Soliciting
material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) </FONT></P>

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<P><FONT FACE="Times New Roman, Times, Serif" SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;|_|
Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR
240.14d-2(b)) </FONT></P>

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<P><FONT FACE="Times New Roman, Times, Serif" SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;|_|
Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR
240.13e-4(c)) </FONT></P>

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<H1 ALIGN=LEFT><FONT FACE="Times New Roman, Times, Serif" SIZE=2>Item 2.02 Results of
Operations and Financial Condition </FONT></H1>

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<P><FONT FACE="Times New Roman, Times, Serif" SIZE=2>On April 21, 2005, MedImmune, Inc.
(the &#147;Company&#148;) issued a press release announcing the Company&#146;s results for
the quarter ended March 31, 2005 and will conduct a previously announced, publicly
available conference call to discuss those results. A copy of the Company&#146;s press
release is attached to this Current Report on Form 8-K as Exhibit 99.1 and is hereby
furnished in its entirety pursuant to Item 2.02. Exhibit 99.1 is not deemed to be
&#147;filed&#148; for the purposes of Section 18 of the Securities Exchange Act of 1934
and is not incorporated by reference into any registration statements filed under the
Securities Act of 1933 or any report filed under the Securities Exchange Act of 1934,
except as described below under the caption &#147;Item 8. Other Events.&#148; </FONT></P>





<H1 ALIGN=LEFT><FONT FACE="Times New Roman, Times, Serif" SIZE=2>Item 8.01 Other Events. </FONT></H1>

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<P><FONT FACE="Times New Roman, Times, Serif" SIZE=2>Exhibit 99.1, other than the section captioned &#147;Looking Ahead in
2005&#148; is incorporated by reference under this item.</FONT></P>


<H1 ALIGN=LEFT><FONT FACE="Times New Roman, Times, Serif" SIZE=2>Item 9.01 Financial Statements and Exhibits.</FONT></H1>
 <P><FONT FACE="Times New Roman, Times, Serif" SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(c) Exhibits.</FONT></P>

<P ALIGN=LEFT><FONT FACE="Times New Roman, Times, Serif" SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Exhibit&nbsp;No.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
Description </FONT></P>

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<P ALIGN=LEFT><FONT FACE="Times New Roman, Times, Serif" SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;99.1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
 Press Release, dated April 21, 2005, titled "MedImmune Reports Financial Results for First Quarter 2005" </FONT></P>


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<H1 ALIGN=CENTER><FONT FACE="Times New Roman, Times, Serif" SIZE=2>SIGNATURE </FONT></H1>

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<P><FONT FACE="Times New Roman, Times, Serif" SIZE=2>Pursuant to the requirements of the
Securities Exchange Act of 1934, the registrant has duly caused this report to be signed
on its behalf by the undersigned hereunto duly authorized. </FONT></P>

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<H1 ALIGN=CENTER><FONT FACE="Times New Roman, Times, Serif" SIZE=3>MedImmune, Inc. </FONT></H1>

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<TD WIDTH=50%><FONT FACE="Times New Roman, Times, Serif" SIZE=2><B></B><BR><BR>
<BR>/s/: Mark E. Spring<BR>&#151;&#151;&#151;&#151;&#151;&#151;&#151;&#151;&#151;&#151;&#151;&#151;&#151;&#151;<BR>
Mark E. Spring<BR>Vice President, Finance and Controller<BR>Principal Accounting Officer</FONT></TD>
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<P><FONT FACE="Times New Roman, Times, Serif" SIZE=2>Date:  April 21, 2005 </FONT></P>


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SECURITIES AND
EXCHANGE COMMISSION
WASHINGTON, D. C. 20549
FORM 8-K
CURRENT REPORT
PURSUANT TO SECTION 13
OR 15(d) OF
THE SECURITIES EXCHANGE ACT OF 1934
Date of Report (Date of earliest event reported)
April 21, 2005
MedImmune, Inc.
(Exact
name of registrant as specified in its charter)
Delaware
0-19131
52-1555759
(State or other jurisdiction of
(Commission File No.)
(I.R.S. Employer Identification No.)
incorporation or organization)
One MedImmune Way,
 Gaithersburg, MD 20878
(Address of principal executive offices) (Zip Code)
Registrant's
telephone number, including area code (301) 398-0000
Check
the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the
filing obligation of the registrant under any of the following provisions (
see
General Instruction A.2. below):
|_|
Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
|_| Soliciting
material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
|_|
Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR
240.14d-2(b))
|_|
Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR
240.13e-4(c))
Item 2.02 Results of
Operations and Financial Condition
On April 21, 2005, MedImmune, Inc.
(the "Company") issued a press release announcing the Company's results for
the quarter ended March 31, 2005 and will conduct a previously announced, publicly
available conference call to discuss those results. A copy of the Company's press
release is attached to this Current Report on Form 8-K as Exhibit 99.1 and is hereby
furnished in its entirety pursuant to Item 2.02. Exhibit 99.1 is not deemed to be
"filed" for the purposes of Section 18 of the Securities Exchange Act of 1934
and is not incorporated by reference into any registration statements filed under the
Securities Act of 1933 or any report filed under the Securities Exchange Act of 1934,
except as described below under the caption "Item 8. Other Events."
Item 8.01 Other Events.
Exhibit 99.1, other than the section captioned "Looking Ahead in
2005" is incorporated by reference under this item.
Item 9.01 Financial Statements and Exhibits.
(c) Exhibits.
Exhibit No.      
Description
99.1                
 Press Release, dated April 21, 2005, titled "MedImmune Reports Financial Results for First Quarter 2005"
SIGNATURE
Pursuant to the requirements of the
Securities Exchange Act of 1934, the registrant has duly caused this report to be signed
on its behalf by the undersigned hereunto duly authorized.
MedImmune, Inc.
/s/: Mark E. Spring
——————————————
Mark E. Spring
Vice President, Finance and Controller
Principal Accounting Officer
Date:  April 21, 2005