Children's Hospital National Medical Center is working to develop a vaccine to cure infant diarrhea, not bone disease, as reported in yesterday's editions. The Post regrets the error.

Rosalynn Carter turned a White House tea for Jihan Sadat of Egypt into an open forum yesterday, leading the discussion by a half dozen experts in their fields on a variety of social problems confronting both the United States and Egypt.

At the end, proving perhaps that Rosalynn Carter might be able to leave the "party" out of a White House tea but never Jimmy Carter out of a White House concert turned up to hear 11-year-old pianist Ana-maria Vera. He sat between to two First Ladies, holding Mrs. Carter's hand much of the time, to hear the young artist perform a recital of selections from Chopin and Scarlatti.

"I have all kinds of favorites (musical artists). They change everyday. Today you're my favorite," he told the youndster, who gave her first recital at age 5 and most recently appeared as guest soloist with Arthur Fielder at the Kennedy Center.

If it was a highly successful ending it had also been a disarmingly informal guests were seated in a semi-circle in the Blue Room behind small tables with namecards prominently dispalyed.

"Your interests and my interests are the same," she told Egypts' First Lady, hesitating slightly over how to address her. (Am I supposed to say 'Madame'? asked Carter. "Just call me Jihan," replied the visitor).

For 45 minutes, men and women prominent in the area of women's rights, the handicapped, medical research and teharts brought the two women up to date on advances in their respective fields.

John Sharon, president of Children's Hospital National Medical Center, told of work to develop a vaccine to cure an infant bone disease which he said he understood afflicts 30 per cent of the children in Egypt.

Dr. Estelle Ramey, Georgetown University endocrinologist and a leading feminist, told of three particular areas where she has been active: opening up medical schools to more women, providing science scholarships to women and assisting centers for "beaten wives".

"Beaten?" asked Jihan Sadat, herself a leading feminist.

Ramey's explanation, that they were often economically deprived women who had no place to go expect for the few centers in some regions of the country, drew further questioning from Sadat.

"How do you help, by giving money or by teaching handicrats? Why don't you let them depends on themselves by teaching them something?"

The problem was somewhat more complex, Ramey said, explaining how some battered wives "feel they may deserve to eb beaten - there is no sense of self at all. And the tragedty is that their sons probably grow up to beat their own wives."

It was a subject that visibly affected Sadat, who suggested a counseing program for the husband, as well, similar, she indicated, to a program in Egypt where "we bring the husband in and in a very kind way teach him how to be kind."

Ramey replied that in the United States two problems prevailed, one concerning the urgency of "emergency" aspects, the other "social services." "The children of those families often have a very high incidence of mental disorders, from neuroses to psychoses."

But it was Dr. Henry Viscardi, chairman of the White House Conference on Handicapped Individuals, whose work may have been of greatest interest to Sadat, known for her efforts on behalf of the handicapped. Born without legs and a self-described "charity patient" until age 7, he told of never being able to stand until he was 23, when he was first fitted with artificial legs.

"In any other land, I might never have been able to be a learned man," he said. "Your interest, Jihan, is appreciated. A man without limbs who sits in Cairo has the same aspirations that I do."

Sadat responded, proposing exchange visits between the handicapped of both countries - "If that is possible I would be very well pleased," she said. It was an idea Rosalynn Carter quickly endorsed as "something else I'm doing - an exchange program between our states and foreign countries. I think it is a great idea to include handicapped individuals in that exchange."

Later, when the discussions had ended, Carter told her guests, who also included Joan Mondale, the National Gallery of Art's J. Carter Brown and Dr. Esin Atil, curator of Islamic Art at the Freer Gallery, that it was "the kind of tea I like - I feel I learned something and I feel that she (Mrs. Sadat) learned, too."

In the morning, Carter met briefly with a group of Asian leaders touring the United States under sponsorship of the League of Women Voters' Overseas Education Fund.

Sitting with them in the White House Library, she suddenly found herself being lobbied - against removal of U.S. troops in Korea and for passage of a congressional bill that would provide authorization for $5.2 billion to three international lending institutions.

"The Communists are all around us," said Somsri Kantamala of Thailand's Ministry of Interior, in urging U.S. presence in Korea. "We need American moral support. We can fight by ourselves, but we think of you as being the big brother of the free world."

The First Lady listened politely, said the views of her guests were helpful but gave no indication of her personal opinions.

"We didn't expect this," Kantamala said later of the exchange, "so I took this opportunity to say what I think."

Said Press Secretary Mary Hoyt later, "Mrs. Carter would appreciate that kind of forthrightness. It takes it out of purely coffee talk and makes it something meaningful."