HUMANA <HUM> DECLARES SHAREHOLDERS RIGHTS PLAN Humana Inc said its board approved a shareholder rights plan, or so-called poison pill plan, to ensure its shareholders receive fair treatment in the event of a proposed takeover. Humana said it is now aware of any effort to gain control of the company. Under the plan its board declared a dividend distribution of one right for each outstanding common share held as of March 16. It said each right entitles holders to purchase a unit of 1/100 of a share of newly authorizes series A participating preferred at 75 dlrs per unit. Humana said the rights become effective after an entity acquires 20 pct or more of its outstanding common or tenders for 30 pct of its stock. After such an acquisition, then each right entitles holders to purchase securities of the company or an acquiring entity having a market value of twice the right's exercise price. Humana said the rights expire March 4, 1997, unless redeemed earlier. It said the rights may be redeemed by the company for one ct per right at any time prior to 10 days following a public announcement that a 20 pct position has been acquired.