Panic (Originally Bakterion, also released as Zombie 4 in Greece) is a 1982 Italian / Spanish film directed by Tonino Ricci.
Plot summary
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A scientist is accidentally mutated into a blood-drinking monster by the pathogens upon which he was experimenting. The government, fearful that the disease may be contagious, orders an air strike of the small town where the monster operates. With the lives of over a thousand people on the line, a lone agent must race against time to kill the monster before the air strike takes place.